八年级上册英语第三单元教案
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八年级上册英语第三单元教案篇1
一、教学目标：
1.语言知识目标：
1)学习掌握下列词汇：copy, return
2)进行一步复习巩固学习Section A部分所学的生词和词组。
3)对询问困难及提出的建议的句型，掌握其规则。
4)通过不同方式的练习，来熟练运用询问及提建议的表达方式。
2.情感态度价值观目标：
让学生了解每个人在生活中都有可能遇到一些挫折和不幸，我们多去向那些不幸和困难的人们多表示自己的爱心，多去理解和帮助他们，多向他们提出解决问题的建议而不是去嘲笑他们。
二、教学重难点言
1.教学重点：
1)复习巩固Section A部分所学的生词和词组，达到熟练运用的目标。
2)熟练掌握和运用询问困难和提建议的表达方式。
2.教学难点：
1) 总结询问问题和提出建议的句型，掌握规则。
2)练习运用所学的句型。
三、教学过程
Step 1 Warming- up and revision
1. Have a dictation of the new words learned in the last class.
make sth. clear (同义词) ___________
talk (同义词) _______________
not allow (同义词) ______________
worried (同义词) ______________
get along with (同义词) ____________
communicate (名词)_____________
old (比较级) _______________
2. Check the homework.
3. Let some Ss read the article in 3a. Then finish the short passage about Sad and Thirteen. (见课件)
1. Sad and Thirteen has some _________. He can’t __________his family. His parents _____ a lot. It’s the only _____________ they have. When they _____, it’s like a big black cloud ____________their home. He doesn’t like it.
His brother always watches whatever he wants until midnight. He _______ to let him watch his favorite TV show. So He always feels ______ and ________ at home.
2. Robert Hunt thinks Sad and Thirteen should _________ these feelings to his family. He should ____ to help. Maybe he _________ _____ jobs around the house so that they have more time _______________________. Second, he could sit down and ____________ ____ his brother. He could ________ that he _________ him watching TV all the time, however, he should let him watch his _____________.
八年级上册英语第三单元教案篇2
【学习目标】
1.学生能掌握六个频率副词的用法。
2.学生能听懂谈论各项活动的对话;学会用英语谈论做各项活动的频率。
3.通过完成各项活动，学生能够养成团结协作的意识，并能合理利用时间。
【学习重点】
学生能够学会用六个频率副词谈论做各项活动的频率。
【学习难点】
通过交流表达和听力训练，掌握六个频率副词
Learning action tips：
Play the video about students\'activities on weekends in class. Let students watch it.
Task 1
Learning action tips：Previewthe words on Page2 in the word list. Students read the words by phonetic symbols,then underline new words in the text and mark the Chinese meaning. At last finishthe task in 1a.
【知识链接】
▲once，twice，three times等次数的表达法
(1)这三个词都表示次数，once是一次，twice是两次，除了一次、两次，其他的次数都用“数字+times”表达。如：三次是three times，五次是fivetimes。
(2)这些表达数的词后与一段时间连用，表示动作多长时间发生几次，即动作的频率。
【导练】
(1)我一周看一次电视。
I watch TV once aweek.
(2)我每天读三次英语。
I read English threetimes__aday.情景导入 生成问题
T：What do you usually do on weekends?
S1：I usually play basketball.
S2：I often go shopping.
S3：I sometimes help my parents with housework.
自学互研 生成能力
Task1Let\'sread new words and the phrases.
1.I can read.(我会读)
housework，once，twice，Internet，program，always，usually，often，sometimes，hardly ever，never
2.I can write.(我会写)
翻译下列短语和句子。
(1)帮忙做家务help__with__housework
(2)在周末on__weekends
(3)去看电影go__to__the__movies
(4)一周两次twice__a__week
(5)上网use__the__Internet
(6)动物世界animal__world
(7)hardly ever几乎不
(8)How often do you watchTV?你多久看一次电视?
(9)我从不逛街。I__never__go__shopping.
(10)I exercise three timesa week.我一周锻炼三次。
3.I can summarize.(我会总结)
频率副词hardly ever的用法：
hardly ever意为“几乎不”，表示否定概念。一般位于实义动词之前，be动词、助动词或情态动词之后。如：
Lucy hardly ever callsme.露西几乎不给我打电话。
Peter is hardly ever late.彼得几乎不迟到。
【拓展】
频率副词的比较：
always(100%)usually(80%)often(30%-50%)
sometimes(20%) hardly ever(5%) never(0%)
(1)汤姆几乎不做运动。Tom hardly ever takes(take)exercise.
(2)平时，他几乎不在家。He is hardly everat home on weekdays.
(3)—I saw you come to schoolby bus this morning.
—Oh，I __B__ come to school by bus，but it is raining today.
A.usually B.hardlyever C.sometimes
Task2Let\'slisten to the tape and finish 1b，2a，2b.
Task3Makeconversations and interview.
How often多久一次
用来提问动作发生的频率。如：
—How often do you go to the library?你多久去一次图书馆?
—Once a week.一周一次。
【备注】
我们学过的有关how的疑问词组：
how old多少岁
how much问不可数名词的数量多少
how many问可数名词的数量多少
how far多远
how long多久;多长
Task 2
Learning action tips:
1.Students turn to Page9 and listen to the tape, finish the listening taskin 1b. Students listen to the tape again and repeat.
2.Students turn to Page10 and listen to the tape, finish the listeningtasks in 2a and 2b. Then students listen again and repeat.
【Method coach】
听录音时，要求学生注意用笔标记：
(1)断句：“|”
(2)语调：升调? 降调?
(3)重读单词：△
(4)不会认读的单词：____
模仿纯正的语音语调，朗读听力材料，培养学生的语言交际能力。
Task 3
Learning action tips：
Students read aloud the dialogue to imitate and make the dialogue andhave practice with“How often do you…?I …twicea week.”And interview classmates and havea report.
【备注】
1.I can practice.(我会练)
阅读2d，完成下列对话。
A：Grace.Are you free next week?
B：Next week (1)is__quite__full__for(相当忙)me.
A：Oh，really?(2)How__come(怎么会呢)?
B：I have dance and piano lessons.
A：(3)What__kind(哪一种)of dance are you learning?
B：Swing dance.
A：(4)How__often(多久)do you have the pianolessons?
B：(5)Twice a week(一周两次).
2.I can make conversations.(我会编对话)
结合课文内容运用how often编写对话，介绍自己课余生活做某事的频率。
A：How__often__do__you__watch__TV?
B：I__watch__TV__every__day.
A：What’s__your__favorite__program?
B：Animal__World.
A：How__often__do__you__watch__it?
B：Twice__a__week.
交流展示 生成新知
Preshow：Show in groups. (Time: six minutes)
Task1：First read the words andphrases in groups，then read together andsum up the usage of the words in groups，markthe difficult words in pronunciation and understanding(students can ask teacherfor help).At last，write them on the blackboard.
Task3：First discuss and checkthe answers of Task 3 in groups, then discuss and set scenes to perform the dialogues,interview students about their holiday activities.Atlast，write them on the blackboard.
Promotionshow: Classshow. (Time：sixteen minutes)
Task1: 1.I can read.(1)Readtogether，pay attention to the pronunciationof “Internet”“program”;(2)Consolidate the words by word games.
2.I can write.(1)Translate the phrasesinto English or Chinese by answering quickly;(2)Readtogether;(3)Spot test：consolidate the usage of the phrasesby making sentences，master the key sentencesby imitating.
3.I can summarize.(1)Sum up the usage offrequency adverbs with the phrases in “I can write”;(2) Spot test：finish the exercises to consolidatethe usage of frequency adverbs，check the answers by answeringquickly and explain.
Task3: 1.I can practice.(1)Choosesome students to translate the key sentences in Task 3;(2)Read together.
2.I can makeconversations.(1)Makedialogues according to the task;(2)Set scenes to performthe dialogues;(3)Question students randomlyaccording to the dialogues.
当堂演练 达成目标
根据句意和汉语提示填写单词。
1.Last month was full(忙的)for them.
2.My mother has lots of housework(家务事)to do every day.
3.Jane practices the piano once(一次)a week.
4.I watched some programs (节目)on TV today，but all of them were boring.
5.Many students use the Internet(互联网)every day.
课后反思 查漏补缺
收获：________________________________________________________________________存在困惑：________________________________________________________________________
八年级上册英语第三单元教案篇3
教学目标
I.词汇与短语：
(1)fall off the bike从自行车上摔下来
(2)hurt oneself伤着自己
(3)teach oneself自学
(4)enjoy oneself过得愉快
(5)rich富有的
(6)poor贫穷的
(7)the Shute family舒特一家
(8)get dressed穿衣服
(9)help oneself (to)自用，随便吃
(10)be up起床
II. Grammar：
1.情态动词can / can’t及过去式could / couldn’t的用法。
2.反身代词的用法。
教学重点与难点
A. Grammar :
1.情态动词could的用法：
(1)用作一种委婉的语气向对方提出建议或请求，在这种情况下，它与can没有时间上的区别，可以换用，但could比can更委婉、更有礼貌。
e.g. a) Could you ask him to call me , please ?
请你让他给我打电话好吗？
(2)表示“过去能够/有能力……”，could / couldn’t是can / can’t的过去式，在这种情况下，can与could不能互换，can表示现在或目前的状况，而could表示过去的状况，两个词有时间上的差别。
Could you swim two years ago ? 两年前你会游泳吗？
No , I couldn’t . 不，我不会。
2.反身代词：
(1)形式：
单数
myself yourself himself herself itself
复数
ourselves yourselves themselves
(2)一般情况下，当句子的主语和宾语是同一个人时，我们常用反身代词作宾语。有些词与反身代词构成了固定搭配：
① (all) by oneself 独自，靠某人自己。例如：
She can do it all by herself .
她可以完全靠自己做这件事。
②hurt oneself 伤着自己，受伤。例如：
I hope she didn’t hurt herself . 我希望她没受伤。
③teach oneself . . . = learn sth . by oneself 自学。
She teaches herself English .
= She learns English by herself .
④buy oneself sth . 给自己买某物。
I can buy myself lots of good things .
我可以自己给自己买许多好东西。
⑤enjoy oneself 过得愉快（=have a good time）。
I always have a good time .
= I always have a good time .
⑥look after oneself 自己照料自己。
He could not look after himself . 他不能自理。
⑦wash oneself . 自己洗漱。
He could not wash himself . 他不能自己洗漱。
⑧help oneself to . . .请随便（取、吃什么东西）。
Help yourselves to the cakes . 请随便吃些蛋糕。
B.重点难点解释：
1. Her first ride on a bike . 她第一次骑自行车。
(1)此处ride是个名词。指（马、自行车、摩托车等）骑乘，（汽车等）乘坐。
Go for a ride in a car . 乘车出去兜风。
(2)这是一个用作解释插图的词组。插图说明往往只要求言简意赅，可以不用句子而用词组来描述即可。如插图3的说明：A swimming lesson .插图6的说明：Help ! Not so clever !
2. Look at this photo of Lily .看莉莉这张照片。
this photo of Lily强调的.是“照片中的人物就是莉莉”。
假如要强调这张照片归莉莉所有，要用Lily’s photo .
3. She’s falling off her bike . 她正从自行车上摔下来。
fall off = fall down from 意思是“从……上摔下来”。
Be careful ! Don’t fall off the ladder .
小心点！别从梯子上摔下来。
4. He had lots of money . 他有许多钱。
(1)lost of表示“很多”的意思，等于a lot of，即可以修饰可数名词，也可以修饰不可数名词。
He had lots of (a lot of ) friends .他有许多朋友。
(2) many / much也是“很多”的意思，但many只可修饰可数名词，much只可修饰不可数名词。
I didn’t have many books . 我没有很多书。
b) He didn’t have much money . 他没有很多的钱。
5.Not everybody in the USA is rich . 在美国并非每个人都富有。
像everybody , everyone , everything , all , both这类总括词与not连用，表示部分否定。
Not all of us like this film .
并非我们都喜欢这部电影。
（=Some of us do like the film , some don’t like the film .）
6. The Shute family lived in the southern part of the USA .
舒特一家住在美国南方。
(1)注意英语中“……一家”的表示方法。
The Shute family = The Shutes 舒特一家
The Green family = The Greens 格林一家
The Turner family = The Turners 特纳一家
(2) southern由south + ern构成，是个形容词，读作，意为“南方的”、“南部的”。类似的词还有：
east + ern = eastern 东方的，东部的
west + ern = western 西方的，西部的
north + ern = northern 北方的，北部的
7. He could not wash himself or get dressed .
他不能自己洗脸或穿衣服。
get dressed 表示主语自身做的动作，类似用法如下：
get washed 洗脸 (wash oneself)
get lost 迷路
get confused 迷惑不解
get married 结婚
C.重点句型与单词的使用：
1. all right的用法
(1)健康良好的，不要紧的。
You look pale . Are you all right ?
你看起来脸色苍白，不要紧吧？
(2)没关系，可以，无妨。
Is it all right if I come to see you tonight ?
今晚我可以来看你吗？
(3)（对道歉、感谢的回答）没关系，不客气，没什么。
Sorry , I’m late .
对不起，我晚了。
That’s all right .
没关系。
(4)（用于对答）好的，知道了。
All right . What time ? 好呀。几点了？
2.“穿着”表示法及其区别：
(1)have on , wear , in表“穿、戴”状态；put on表动作；dress可表动作，其被动式be dressed表示状态。
(2)dress
①dress作及物动词，后接人做宾语，意为“给某人穿衣服”。
Could you dress the children for me ?
你能否替我给孩子穿衣服？
②be dressed in指某人在某场合穿什么衣服。（多强调颜色）
③have on指“穿”的状态，后可接衣服、帽子、鞋子等能穿戴的东西，但它不能用于进行式。
He has on a blue coat today .
今天他穿着一件蓝上衣。
④put on 指“穿”的动作，反义词为“take off”。
You should put on your jacket . 你应该把夹克穿上。
⑤wear后面接可穿戴的东西，也包括眼镜、首饰等，可用于进行时态。例如：
He is wearing a ring today .今天他戴了个戒指。
⑥be in表示状态后接衣服，也可接颜色。例如：
The boy in black is my brother .
穿黑衣服的那个男孩是我的兄弟。
动作
状态
put on
dress
wear
have on
be dressed (in)
be in
3.谈论过去的经历：
(1)Could she swim when she was . . . years old ?
当她……岁时，她会游泳吗？
Yes , she could . 是的，她会。
No , she couldn’t . 不，她不会。
(2)Did she learn all by herself ? 她是完全自学的吗？
Did he enjoy himself ? 他过得愉快吗？
4.其他内容：
(1)Help yourself / yourselves to . . . 请随便吃些……
(2)I’m afraid so .恐怕如此。
(3)Would you like a drink ?你要来杯饮料吗？
Yes , please . 是的，请给我来一杯。
No , thanks . 不要，谢谢。
(4)Don’t forget anything . 别忘了什么东西。
(5)Thank you for having us . 谢谢款待我们。
It was my pleasure . 不客气。
5.汉译英练习：
a)The problem is easy I can do it by myself . （我可以自己把它作出来）
b)He learned to write by himself . （自学写字）
c)I think he didn’t hurt himself （他没受伤）that night .
d)He is old enough to dress himself and wash himself .（自己穿衣、自己洗脸）
e)He is too young to look after himself .（不能自己照顾自己）
八年级上册英语第三单元教案篇4
第一课时 Section A (1a～2d)
【学习目标】
1.学生学会形容词或副词比较级形式的构成及两者进行比较的一些常用词汇与句型。
2.通过听对人物的外表进行描绘、个性进行比较的对话，学生学会怎样就两者进行比较。
3.学生学会用比较级进行信息交流，增强自信心，多交益友，快乐生活，快乐学习。
【学习重点】
用所学的功能语言交流如何运用比较级描绘人物的外貌与个性。
【学习难点】
学习形容词和副词比较级的用法
Learning action tips：Accordingto the actual situation of the students in class, create scene to lead in the new course by the way of teacher and student\'squestion and answer：
—Which one is more hardworking at their lessons? —Lisa is.
And revise the adjectives about describing the appearance and personalityof a person.
Learning action tips: Preview the words on Page17-18 in the word list. Students read the words by phonetic symbols, thenunderline new words in the text and mark the Chinese meaning. At last finish thetask in 1a.
【知识链接】
clearly adv.清楚地;清晰地;明白地
【拓展】
形容词后加上ly常构成副词。eg：loud→loudly;quiet→quietly;serious→seriously;usual→usually;different→differently;real→really
friendly adj.友好的
(1)friendly的比较级是more friendly。
(2)be friendly to sb.对某人友好的。
【拓展】
某些名词后加上ly可构成形容词。eg：month→monthly;mother→motherly;week→weekly;day→daily情景导入 生成问题
1.T：Whatdo you think of your best friend?
S：________________________________________________________________________
2.T：Isshe taller than you?
S：________________________________________________________________________
自学互研 生成能力
Task1 Let\'sread the new words and the phrases.
1.I can read.(我会读)
outgoing，better，loudly，quietly，hardworking，competition，fantastic，which，clearly，win，though
2.I can write.(我会写)
翻译下列短语：
(1)敲鼓play__the__drums (2)长(短)头发long(short)__hair
(3)更外向more__outgoing (4)和……一样努力work__as__hard__as
(5)起得早get__up__early (6)跑得快run__fast
(7)歌咏比赛the__singing__competition
(8)最主要的事情the__most__important__thing
(9)学到新东西learn__something__new (10)玩得高兴have__fun
3.I can summarize.(我会总结)
形容词和副词比较级的变化规则：
(1)一般的在词尾加er
(2)以不发音的字母e结尾的词尾加r
(3)以一个辅音字母结尾的重读闭音节，先双写这个辅音字母再加er
(4)以辅音字母加y结尾先改y为i再加er
(5)多音节和部分双音节词在该词前面加more
(6)不规则的变化需要我们用心记忆
写出下列形容词或副词的比较级。
(1)long longer (2)short shorter (3)nice nicer (4)early earlier
(5)big bigger (6)hot hotter (7)thin thinner (8)easy easier
(9)quietly more__quietly (10)beautiful more__beautiful (11)good better
Task2 Let\'slisten to the tape and finish 1b，2a，2b.
Task3 Makeconversations an interview.
1.I can practice.(我会练)
A：Peter，(1)is__that__Paul?
B：No, that\'s Tom. Paul is thinner thanTom.
And he also (2)has__longer__hair(更长的头发)than Tom.
A：Oh，(3)can__they__sing?
B：Yes, they can sing well.
A：(4)Who__can__sing__better，Paul or Tom?
B：Tom sings better than Paul…
win
v.获胜;赢;赢得
n.winner 获胜者
【辨析】
win与beat
两者均可作动词，意为“赢”，但用法不同：
(1)win(won，won)后接比赛、竞赛、战斗、奖品、钱等名词。
(2)beat(beat，beaten)后接竞争对手。
【导练】
(1)我们的队赢得了篮球比赛。Our team won the basketball match.
(2)昨天乒乓球比赛我打败了内莉。I beat Nelly at pingpong yesterday.
Task 2
Learning action tips：
1.Students turn to Page17 and listen to the tape, finish the listeningtask in 1b. Students listen to the tape again and repeat.
2.Students turn to Page18 and listen to the tape, finish the listeningtasks in 2a and 2b. Then students listen again and repeat.
Task 3
Learning action tips：Readaloud the dialogue in 1c，2c,2d, students imitate and make the dialogue, have a dialogue practice with the structurein 1c，2c and 2d, and havean interview with students and report.
【Method coach】
听录音时，要求学生注意用笔标记：
(1)断句：“|”
(2)语调：升调? 降调?
(3)重读单词：△
(4)不会认读的单词：____
模仿纯正的语音语调，朗读听力材料，培养学生的语言交际能力。
八年级上册英语第三单元教案篇5
一.教学内容：
Module 2 Friendship
二.重点内容：
语法知识：宾语从句；
语言知识：词汇及词语辨析
三.具体内容：
（一）语法指南
宾语从句
放在动词后面做宾语的句子，我们称之为“宾语从句”。宾语从句根据其表达意义与疑问的差别可以分作三类，一类由that引导，一类由whether/if引导，还有一类由疑问词引导。常用作宾语从句的连词有：that, if whether, what, which, who, whom, where, how, why等。
1. 当谓语动词表示肯定概念时，如“希望”、“相信”“知道”“说”，其后面的句子一般用that引导。That没有任何词汇意义，只有语法功能，使读者清楚后面的句子是前面动词的宾语。That在从句中不充当任何句子成分，只起连接主句和从句的作用。that不用翻译出来，在口语当中常省略。除此以外，又语从句中有自己的主语，很容易与前面的主句分开，因此多数情况下that可以省略。如：
Betty thinks（that）trees improve the air.
贝蒂认为树可以改善空气。
I hope（that）it will snow this winter.
我希望今年冬天能下雪。
I believe（that）we’ll become good friends.
我相信我们会成为好朋友。
有一点要注意，并非所有的动词后面都可接that引导的从句。接that引导的从句的谓语动词不可含有疑问的含义，常见的多是表示观点、看法、意念、要求等方面概念的词，如：believe, feel, hear, hope, expect, explain, prefer, promise, report, say, see, tell, think, understand, wish, warn等。
2.whether/if 引导的宾语从句
如果我们要标达一个不确定的概念，比如：“记不清”、“不知道”、“问”、“想知道”等等，就要用whether/ if 表示，不能再用that。
He doesn’t know whether they will plant trees on Saturday or not.
他不知道他们周六是否会去植树。
I can’t remember whether/if I have seen him before.
我记不清以前是否见过他。
He asks whether/ if we will go fishing on Sunday.
他问周日我们是否去钓鱼？
Tom wants to know whether/ if he needs to come early tomorrow.
汤姆想知道明天他是否有必要早来。
注意：一般情况下if和whether可以通用。但如果从句后面还有一个选择性词语or not，则常用whether，构成whether…or not的结构。
3.疑问词引导的宾语从句
有的句子不是用that连接，也不是用whether或if连接，而是用when，where，how，
Why等疑问词连接。这是从句意思表达的需要。比如“他问什么时间出发”中的“什么时间出发”必须用一个疑问词才能表达；如果遇到什么时间，什么地点，什么方式，什么原因之类的疑问时，我们就要是用相应的疑问词来连接从句。但是同学们一定要注意，在疑问词引导的宾语从句中，一定要用陈述句语序。如：
He asks how we can help protect the environment.
他问我们怎样才能为保护环境出点力。
I can’t understand why they like computer games so much.
我不理解他们为什么如此喜欢电脑游戏。
They haven’t decided where they should go for the holiday.
他们还没有确定到什么地方去旅行。
Do you know when we will hold the sports meeting?
你知道我们什么时候开运动会吗？
（二）语法专项训练
1. —Do you know ______ I could pass the exam?
—Sorry, I’ve no idea.
A. thatB. whetherC. whatD. which
2. —I’m waiting for the mail. Do you know _______ it will arrive?
—Usually it comes by 4:00.
A. howB. whereC. whenD. what
3. I’d like to know _____ or not.
A. whether will he comeB. whether has he come
C. whether he will comeD. that he will come
4. They asked me ________ during the May Day holidays.
A. where had I goneB. where I had gone
C. where had I beenD. where I had gone
5. She did not tell us ________.
A. how old the patient isB. how old was the patient
C. how old the patient wasD. how old is the patient
6. —We don’t know _______ he is.
—They say he is much better these days.
A. whatB. whoC. howD. where
7. Could you tell me _____ yesterday?
A. what they doB. what they did
C. what do they doD. what did they do
8. I knew that the sun ________ in the east when I was a child.
A. will riseB. roseC. riseD. rises
9. She said ______ she would leave the message on the headmaster’s desk.
A. thatB. whereC. whichD. what
10. The man asked me if I _______ him the way to the bus stop.
A. can tellB. could tellC. will tellD. tell
（三）重点句子详解
1. Dig slowly, or you‘ll be too tired to finish.
慢慢挖，不然的话你会很累，干不完活的。
本句是“祈使句+or+并列分句”的句型，or连接连个分句，前面的分句相当于if引导的否定性从句。如：
Hurry up, or you’ll be late.
= If you don’t hurry up, you will be late.
你快一点，不然就迟到了。
Take the chance, or you will regret.
=If you don’t take the chance, you will regret it.
抓住这个机会，否则你会后悔的。
Stand still, or I’ll shoot.
=If you don’t stand still, I’ll shoot.
有时前一个句子只有一个名词或名词短语。
A word from you and he’ll change his mind.
=If you say a word, he’ll change his mind.
只要你说一句话，他就会改变主意。
One more foul and he’ll be sent out of the court.
他再犯一次规，就要罚出场了。
“祈使句+and+并列分句”的句型中，祈使句表示条件，相当于一个条件状语从句。如：
Work hard and you’ll succeed.
= If you work hard, you’ll succeed.
努力学习，你就能成功。
Stir，and you are a dead man.
=If you stir, you are a dead man.
动一动我就打死你。
too…to意为“太……而不能……”，其句型结构为“too+形容词/副词+to+动词原形”，该句型用于肯定句，但表达否定的意思。如：
He is too old to walk.
他太老了，以致走不动了。
It’s too hard for him to learn English well.
学好英语对他来说太难了。
The box is too heavy for me to carry.
那只箱子对我来说太重了，搬不动。
当too…to do前面有only，but等词时，或出现“never too…to do”或“too…not to do”的双重否定时，该句型就不表达否定含义了。如：
It’s never too old to learn.
活到老，学到老。
You are never too old to enjoy the music.
你不会因为年纪大了而不喜欢这音乐。
2. We’re cutting down too many trees.
我们正在过量砍伐树木。
cut down 此处意为“砍倒”
A quarter of the forest reserves had been cut down by 1974.
到1974年，四分之一的森林保护区已被砍伐一空。
How much is it going to cost us to cut all these trees down?
把这些树全部砍倒要花费我们多少钱？
cut down可意为“削减”“减少”，如：
Save time for yourself by cutting your shopping down to twice a week.
拔去商店购物减少到每星期两次，以此为自己节省时间。
She cut down on smoking.
她抽烟有所减少。
cut down可以表示“改短（衣服）”
If you cut down this T-shirt, it’ll fit your son.
如果你把T恤改短，就能适合你儿子穿。
cut someone down to size 表示“使（某人）知道自己的分量”“使（某人）有自知之明”。
That should cut her down to size.
那该让她有点自知之明了。