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---Who is making much noise?

---It ____ be Timmy. He is sleeping now.

A. can’t B. may not C. mustn’t D. couldn’t

A

【解析】

試題分析:句意:-誰在制造噪音?-不可能是Timmy,他現(xiàn)在在睡覺。can’t不可能;may not 可能不;mustn’t禁止,不要;couldn’t可能不。根據(jù)句意可知選A。

考點(diǎn):考查情態(tài)動(dòng)詞。

考點(diǎn)分析: 考點(diǎn)1:情態(tài)動(dòng)詞 初中英語情態(tài)動(dòng)詞用法詳解
【情態(tài)動(dòng)詞知識(shí)梳理】
情態(tài)動(dòng)詞有具體的詞義,但也同助動(dòng)詞一樣,需要與其他詞語一起構(gòu)成句子的謂語,另外情態(tài)動(dòng)詞沒有人稱和數(shù)的變化,情態(tài)動(dòng)詞后必須跟動(dòng)詞原形。
考點(diǎn)一:can,may,must等情態(tài)動(dòng)詞在陳述句中的用法:
1. can的用法:
(1).表示能力、許可、可能性。表示能力時(shí)一般譯為“能、會(huì)”,即有種能力,尤其是生來具備的能力,此時(shí)may和must均不可代替它。如:She can swim fast, but I can’t . 她能游得很快,但我不能。I can see with my eyes.我用眼睛看。
(2).表示許可,常在口語中。如:You can use my dictionary.  你可以用我的字典。
(3).表示推測(cè),意為“可能”,常用于否定句和疑問句中,此時(shí)can’t譯為“不可能”。如:Can the news be true?這個(gè)消息會(huì)是真的嗎?—Can it be our teacher?那個(gè)人有可能是我們老師嗎?—No, it can’t be our teacher. He is on a visit to the Great Wall.不可能。咱們老師正在游覽長(zhǎng)城呢。
情態(tài)動(dòng)詞有具體的詞義,但也同助動(dòng)詞一樣,需要與其他詞語一起構(gòu)成句子的謂語,另外情態(tài)動(dòng)詞沒有人稱和數(shù)的變化,情態(tài)動(dòng)詞后必須跟動(dòng)詞原形。
2. could的用法:
(1).can的過去式,意為“能、會(huì)”,表示過去的能力。如:He could write poems when he was 10. 他十歲時(shí)就會(huì)寫詩(shī)。
(2). could在疑問句中,表示委婉的語氣,此時(shí)could沒有過去式的意思。如:Could you do me a favour?你能幫我個(gè)忙嗎?—Could I use your pen?我能用一下你的鋼筆嗎?—Yes, you can.可以。(注意回答)
3. may的用法:
(1).表示請(qǐng)求、許可,比can正式,如:May I borrow your bike?我可以借你的自行車嗎?You may go home now.現(xiàn)在你可以回家了。
(2) .表示推測(cè),談?wù)摽赡苄,意為“可能,或許”,一般用于肯定句中。如:It may rain tomorrow .明天可能會(huì)下雨。She may be at home.她可能在家呢.
(3) .may的過去式為might,表示推測(cè)時(shí)?赡苄缘陀趍ay。如:He is away from school. He might be sick.
他離開學(xué)校了,可能是他生病了。
(4) . 表示希望、祈求、祝愿,?勺g為“祝愿”。通常是用may +主+V例如:May you have a good time.祝你過得愉快。May you be happy!祝你幸福!May you succeed!祝你成功!
4. must的用法:
(1).must表示主觀看法,意為“必須、一定”。如:You must stay here until I come back.在我回來之前你必須呆在這兒。Must I hand in my homework right now?我必須現(xiàn)在交作業(yè)嗎?
(2)其否定形式mustn’t表示“一定不要” “千萬別” “禁止,不許”.如:You mustn’t play with fire. 你不許玩火。You mustn’t be late.你一定不要遲到。
(3)對(duì)must引導(dǎo)的疑問句,肯定回答為must,否定回答為needn’t 或don’t have to .如:—Must I finish my homework?我現(xiàn)在必須完成作業(yè)嗎?—No, you needn’t.不,你不必。
 (4)must表示有把握的推測(cè),用于肯定句。如: The light is on, so he must be at home now.燈亮著,他現(xiàn)在肯定在家。
注意其反意問句的構(gòu)成形式:
當(dāng)must表示肯定的判斷、推測(cè)時(shí),其反意疑問句要用實(shí)際問句的助動(dòng)詞來構(gòu)成。如:She must have seen the film before,hasn’tshe?(注意反意疑問句的后半部分)You must have met uncle Wang in the shop yesterday,didn’t you? (注意反意疑問句的后半部分)
5. need的用法:
(1).need表示需要、必須,主要用于否定句和疑問句中,其否定形式為needn’t,意為“沒有必要,不必”。用need提問時(shí),肯定回答為must,否定回答為needn’t或don’t have to。如:—Need I stay here any longer? 我還有必要留在這兒?jiǎn)幔俊猋es, you must .是的!狽o. you needn’t /don’t have to.不,你不必。
(2).need還可以作實(shí)義動(dòng)詞,此時(shí)有人稱、數(shù)和時(shí)態(tài)的變化,如果是人作主語后邊多接動(dòng)詞不定式。如:I need to do it right now.我需要馬上做這件事。He needs to learn more about the girl.他需要多了解那個(gè)女孩。如果是物作主語,一般用need doing與need to be done這種情況下應(yīng)注意兩點(diǎn):
①.主動(dòng)形式的動(dòng)名詞doing具有被動(dòng)的含義;
②.該動(dòng)名詞可以改為其動(dòng)詞不定式的被動(dòng)形式而句子的意義不變。例如:. The door needs painting. = The door needs to be painted.那扇門需要油漆一下。Your car needs mending. = Your car needs to be repaired.你的車需要維修了。
6. dare的用法:dare意為“敢、敢于”,用法近似于need,有兩種詞性:
(1)dare作為情態(tài)動(dòng)詞,多用于否定句、疑問句或條件句中,無第三人稱單數(shù)形式,只有一般現(xiàn)在時(shí)和一般過去時(shí)。如:Dare he tell them what he knows?他敢告訴他們所知道的情況嗎?I daren’t ask her – will you do it for me?我可不敢問她,你能幫我問問嗎?
(2)dare作為實(shí)義動(dòng)詞,此時(shí)有人稱、數(shù)及時(shí)態(tài)的變化。如:He doesn’t dare to break his promise.他不敢食言。
 注意:在口語中,dare的各種形式常與不帶to的不定式連用。如:Do you dare tell her what I said?
你敢告訴她我說的話嗎?I didn’t dare look at him.我不敢看他。
7. shall的用法:
shall表示征求對(duì)方意見(多用于第一、三人稱),如:Shall we go out for a walk?我們出去散步好嗎?
在英語中,我們可以用其他多種方式提出我們的建議或征求對(duì)方意見。
(1).用“Let's do...”來提出建議。如:Let's go for a walk after supper.
(2).用“What/How about...?”來提出建議;about后接名詞或動(dòng)詞ing形式。如:What about/How about a drink? What about/How about taking Tom with us?
(3).用“Why not...?”來提出建議,表示“何不……”not面后接動(dòng)詞原形!癢hy not...?”實(shí)際上是“Why don't you/we...?”的簡(jiǎn)略形式。如:Why not meet at the school gate at eight? Why don't we stay here another day?
(4).用“Would you like...?”來提出建議,意思是“你想要……嗎?”Would you like后可接名詞或不定式。如:Would you like a cup of tea? Would you like to go and see her?
因此,如果我們說:“去游泳好嗎?”英語中可有這樣幾種表達(dá)法:Shall we go for a swim? Let's go for a swim,shall we? What about/How about going swimming? Why not go for a swim? Would you like to go for a swim? What do you think of going for a swim?
8. should的用法:
(1).should意為“應(yīng)該”,可表示勸告、建議、義務(wù)、責(zé)任等。如:We should protect the environment.我們應(yīng)該保護(hù)環(huán)境。
(2)Should have done表示對(duì)過去動(dòng)作的責(zé)備、批評(píng)。如:You should have finished your homework.
你應(yīng)該已經(jīng)完成作業(yè)了。(事實(shí)上你沒有完成。)
9. will的用法:
will表示意愿、意志、打算,可用于多種人稱。如:I will help you if I’m free this afternoon.今天下午如果我有空,我就會(huì)幫你。
注意:
1、will在there be句型中的形式及其句式變換。
2、will與be going to do something區(qū)別:
①. be going to表示近期、眼下就要發(fā)生的事情,will表示的將來時(shí)間則較遠(yuǎn)一些,如:He is going to write a letter tonight. He will write a book one day.
②. be going to表示根據(jù)主觀判斷將來肯定發(fā)生的事情,will表示客觀上將來勢(shì)必發(fā)生的事情。He is seriously ill. He is going to die.   He will be twenty years old.
③. be going to含有“計(jì)劃,準(zhǔn)備”的意思,而will則沒有這個(gè)意思,如:She is going to lend us her book.
He will be here in half an hour.
④.在有條件從句的主句中,一般不用be going to,而多用will,如:If any beasts comes at you, I'll stay with you and help you.
10. had better的用法:
  had better意為“最好”,沒有人稱的變化,后面接不帶to的不定式,其否定形式為:had better not。如:
We had better go now.我們最好現(xiàn)在就走。You had better not give the book to him.你最好不要把這本書給他。
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