2020-2021學(xué)年新教材英語外研版必修第二冊(cè)教案：Unit 1 Food for thought 突破·語法大沖關(guān) Word版含解析

1、好好學(xué)習(xí)，天天向上情態(tài)動(dòng)詞（1）一、情態(tài)動(dòng)詞的特征1情態(tài)動(dòng)詞表示說話人對(duì)某一動(dòng)作或狀態(tài)的態(tài)度，有一定的詞義,但不能單獨(dú)作謂語,必須和動(dòng)詞原形,即不帶to的不定式連用，才能構(gòu)成謂語.2情態(tài)動(dòng)詞沒有人稱和數(shù)的變化（have to例外,主語是第三人稱單數(shù)時(shí)，要用has to）。二、情態(tài)動(dòng)詞的基本用法1be able to/can/could觀察例句this time i failed，but ill be able to pass the exam next time.mary can speak three foreign languages。he was able to leave german

2、y for america during the second world war.tom could sing english songs at the age of 6.what can they be doing there? he cant be in the classroom,for the light has been turned off.everything can happen. could i use your bike？ - of course you can.歸納用法（1)表示能力。be able to和can都表示能力,意義上沒有區(qū)別。但be able to可用于多

3、種時(shí)態(tài)，而can只有現(xiàn)在式和過去式(could）。注意:was/were able to表示經(jīng)過一番努力，最后做成了某事;而could表示過去一般的能力。(2)表示推測(cè)。can表示推測(cè),常用于疑問句和否定句，有時(shí)也可用于肯定句表示理論上的可能性，表示“有時(shí)候可能會(huì)”.could與can相比表示較小的可能性。(3)表示請(qǐng)求和允許。在問句中，could比can語氣更委婉。即學(xué)即練1選詞填空(be able to/can/could)theres someone outside-who can it be?however great the difficulties may be,we can ov

4、ercome them。the fire was very big，but all the people were able to escape from it.i cant give you details because i dont actually have any details。could i have a word with you if youre not too busy?2have to/must觀察例句each student has to hand in a composition once a week。we must do everything step by st

5、ep.you dont have to worry about me。im a good swimmer.that car is my property; you mustnt use it without my permission.he must be ill.he looks so pale.if you must go，at least wait until the storm is over.歸納用法(1)have to意為“不得不，一般指客觀，有時(shí)態(tài)和數(shù)的變化；而must意為“必須;應(yīng)該”，一般指主觀,沒有時(shí)態(tài)和數(shù)的變化。(2）have to的否定式意為“不必，而mustnt表禁止

6、。（3)must表示推測(cè)，意為“一定會(huì)，只能用于肯定句。(4）if you must(do sth。)表示雖不贊同但可允許，意為“如果你一定要（那么做）”即學(xué)即練2選詞填空（have to/must)she has to do it herself。she has got no one to help her.they had to put off the sports meet because of the bad weather。teachers must be patient enough with their students.this book mustnt be removed f

7、rom the library。if you must smoke，please go outside.3dare/need觀察例句you neednt answer my question now.need i tell him everything that has happened to his parents？he dared not tell his parents the truth.dare he go home along at night？he asked me if i dared ride a horse.歸納用法need和dare用作情態(tài)動(dòng)詞時(shí)，主要用于疑問句、否定句和

8、條件從句，dare有時(shí)態(tài)變化。另外,need和dare也可用作實(shí)意動(dòng)詞。即學(xué)即練3完成句子我喜歡周末，因?yàn)椴槐卦缙?。i love the weekend，because i neednt/dont need to get up early需要我馬上把孩子們召集在一起嗎？need i gather the children together at once？你怎么敢說我是賊呢？how dare you say i am a thief?他問我是否敢摸大象。he asked me if i dared（to)touch an elephant4had better觀察例句i think you h

9、ad better go to the doctor about your cough。we had better not remain here any longer。歸納用法had better do sth。意為“最好做某事”，否定形式為had better not do sth。即學(xué)即練4翻譯句子你明天最好早來.you had better come early tomorrow。你最好別錯(cuò)過末班車。you had better not miss the last bus。用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空1he wont be able to come again tomorrow because

10、 he is very busy。2you cant smoke here。go out of the house if you must3he broke his leg and had to lie all the time。4she could play several instruments at the age of eight.5we had better not just talk .lets go and help them。6tony has known the good news，so you neednt tell it to him.7parents are doing

11、 all they can to help their children achieve their ambitions。8as he was seriously ill，he had to stay in hospital.9he dare not do it because he is very afraid.10he cant be attending the meeting now because he has gone to beijing on business.。用適當(dāng)?shù)那閼B(tài)動(dòng)詞或括號(hào)內(nèi)單詞的適當(dāng)形式完成短文mary 1.could not read for very long

12、with getting a headache。her best friend suggested her having an eye examination?！皔ou 2。had better go to the health service and have your eyes 3。examined（examine)” her friend said.when mary arrived at the health service，she found many people queuing up there。so she 4。had to wait for her turn。when it

13、was her turn，the doctor examined her eyes carefully and said，“i 5。dare say you dont pay attention to 6。protecting（protect） your eyes.but you 7。neednt/dont have to worry about it.use some medicine and dont make your eyes too tired,and soon you will 8.be able to recover?！眛his experience taught mary the 9。importance（important） of protecting eyes。she told her best