高中英語語法：情態(tài)動詞

1、PAGE PAGE - 3 -Modal Verbs、情態(tài)動詞概述 1表示能力 He can carry the heavy box. 2表示職責 ought to / should, have to 和must的語氣由弱到強 You must work as hard as possible. 3表示確定 might表示非常不肯定，my, could, should, ought to, will語氣逐漸增強，must則表示幾乎完全肯定 You might beat him in the competition. 4表示許可 在非正式場合或英語口語中，常用can或could表示許可，coul

2、d更有禮貌。而在正式場合或書面語中，則常用may或might表示許可，might更正式。 You can go out to play after you finish your homework. 5表示提出要求 在從非正式場合至正式場合的過渡中，依次使用will, can, could和would Can you help me with my English? 6表示給出建議 Shall we do some shopping tomorrow?、情態(tài)動詞的用法 1can / could 表示能力 He could speak English when he was four years

3、 old.表示請求或允許 表示委婉地請求或陳述看法時，口語中多用could, 但回答時仍然用can You cannot park your car here. Could I see your driving license? Of course you can.表示推測 He cant be at home now. 2may / might 表示征求對方意見或允許 might比may語氣更加婉轉(zhuǎn)一些，是比較正式的用法，口語中使用can比較普遍 You may come if you wish. He asked if he might go home.表示推測 He may come v

4、ery soon. may well 很可能，極有可能 might /may as well 不妨做某事 may not 3must表示“必須”，mustnt表示“禁止” You must hand in your composition today. You mustnt park here! Its an emergency exit. (重慶2010)表示推測 He must be ill. He looks so pale.用must提問時的回答 Must I finish my homework today? No, you neednt. / Yes, you must.must表

5、推測時的反意疑問句不考慮must They must be playing basketball, arent they? You must have studied English for years, havent you? He must have finished it, hasnt he?He must have finished it yesterday, didnt he? must非得，一定要 May I park in this amusement park? If you must, choose a place where there are few children.

6、Must you worry her with questions, just when she is busy cooking dinner? 4should / ought to表示應(yīng)該 You should complete your experiment in time.表示推測 They should be at home by now, I think. 到家 情態(tài)動詞+have done 對過去事實的一種猜測和判斷 5will / would表示意愿 I would go there with you.表示習慣和傾向性 This window wont open.這扇窗戶經(jīng)常打不

7、開。 When he was a child, he would go skiing.*will如在疑問句中表示征求對方意見，則和第二人稱連用 6shall征求對方意見 第一、三人稱 What shall we do this evening? Shall he come in?表示命令，警告，允諾，威脅 第二、三人稱 Every competitor shall arrive there in time. If you behave well, you shall get a present.You shall fail to pass the entrance examination if you dont study harder. The school rules state that no child shall be allowed out of the school during the day, unless accompanied by an adult. 7need, dare 通常用于疑問句和否定句 You neednt go training if you feel tired. You dont need to go tra