【正文】 第一篇：情態(tài)動詞的基本用法情態(tài)動詞的基本用法情態(tài)動詞的特點(diǎn)。：will → would , can → could , may→ might , dare → daredcan(could)。Two eyes can see more than 。Can I have a look at your new pen?Can(Could)you lend me a hand?、懷疑、不相信等態(tài)度。主要用于否定句、疑問句或感嘆句中。Where can(could)they have gone to?He can’t(couldn’t)be over can you be so careless?(肯定句把握較??；否定句幾乎為100%把握)The temperature can fall to 10℃.You can’t be (might)1．表允許，might是may的過去式。用在疑問中比may委婉、客氣。You may take whatever you told me that I might smoke in the （事實(shí)上）。語氣不肯定。He may be at 。She may not know about am afraid they might not agree with might be having a meeting, but I’m not （主觀意志）We must do everything we can to help mustn’t talk to her like we hand in our exercise books now?No, you needn’t./ No, you don’t have ，意為“想必、準(zhǔn)是、一定”等，只用于肯定句。have(has)to：have(has)got to 必須, 不得不。過去式為had to。He must be looks so must have a lot of money, for she drives a ，用于第一、第三人稱疑問句。Shall I get you some tea?Shall the boy wait outside?It39。s a fine 39。s go fishing, shall we?，有“命令、允諾、警告、決心”等意思，用于第二、第三人稱陳述句。You shall do as I say.（命令）You shall have the English book as soon as I finish it.（允諾）He shall be sorry for it one day, I tell you.（警告）Everything that he owns shall be taken away from him.（決心）will，用于各種人稱陳述句。I will do anything for you will read the book, I’ll lend it to ，用于疑問句。Don39。t smoke in the meeting room, will you?Won’t you drink some more coffee? 。Fish will die out of door won’t 。They would not let him in because he was poorly 、建議或看法。Would you like another glass of beer?。Every time she was in trouble, she would go to him for 。意為“應(yīng)該”，用于各種人稱。You should listen to the doctor39。s 。You should study the article 。，意為“想必一定、照說應(yīng)該、估計(jì)”等。The film should be very good as it is starring firstclass ，都是一流的演員。They should be home by ought to“應(yīng)該”，口氣比should稍重。Ought you to smoke so much? 你應(yīng)該抽這樣多煙嗎？You ought to write to the 。，暗含很大的可能。She ought to know his telephone 。used to過去常常, 現(xiàn)在不復(fù)發(fā)生或存在。The Greeks used to worship several ,希臘人崇奉好幾種神。He used to （現(xiàn)在不抽了）。情態(tài)動詞的推測用法⒈ 肯定句中：must(一定)，may(可能)，might/could(也許，或許)其語氣的肯定程度依次遞減。其中，might 和could并非過去時(shí)態(tài)，只是語氣較為委婉或可能性較小 ⑴ 對當(dāng)前行為、情況或狀態(tài)的推測：must /may /might /could + do/beHe must/may/might/could be in the reading 。I must look funny in this 。⑵ 對此時(shí)此刻正在進(jìn)行的動作的推測：must /may/ might/ could + be doing想必/可能正在……He must /may/ might/ could be watching TV at this 。They must be waiting for 。⑶ 對過去發(fā)生的事情的推測：must /may /might /could + have +過去分詞想必/可能已經(jīng)……They must have arrived by 。You look very must have stayed up last ，你昨晚一定熬夜了。You may have read about it in the 。⑷ 過去的一段時(shí)間內(nèi)一直在進(jìn)行的動作：must/may /might/ could + have + been +doing想必/可能一直在……They are sweating all must have been working in the ，準(zhǔn)是在地里勞動來著。He may have been waiting for us for an 。2．否定句中：can/could not不可能，想必不會may/might not可能不⑴對當(dāng)前行為、情況或狀態(tài)的推測：can/could not+動詞原形不可能，想必不會may/might not +動詞原形可能不He may not be busy 。He can not be busy 。He can’t be in the reading saw him on the playground just ，我剛看到他在操場上。⑵對此時(shí)此刻正在進(jìn)行的動作的推測：can/could not + be doing不可能，想必不會在干某事may/might not + be doing可能沒在干某事They can’t be telling the 。They may not be telling the 。⑶對過去發(fā)生的事情的推測：can/could not + have +過去分詞不可能，想必不會做過某事may/might not + have +過去分詞可能沒干過某事He can’t have finished the work so 。He may not have achieved all his his effort is a good ，但他還是認(rèn)真做了努力的。⑷過去的一段時(shí)間內(nèi)一直在進(jìn)行的動作：can’t /couldn’t/may not have been doingHe can’t have been waiting for us so 。3．疑問句中：常用can/could來表示說話人的猜疑、懷疑或不肯定的語氣⑴ 對當(dāng)前行為、情況或狀態(tài)的推測：can/could + 主語+ do/beWhere can he be now?他現(xiàn)在會在哪里呢？Can it be true?那會是真的嗎？⑵ 對此時(shí)此刻正在進(jìn)行的動作的推測：can/could +主語+ be doingIt’s so Tom be reading?這么晚了，湯姆還在看書嗎？What can he be doing?他可能在做什么呢？⑶ 對過去發(fā)生的事情的推測：can/could +主語+have doneCan she have told a lie?她會不會說謊了？Where can she have gone?她會上哪兒去了呢？情態(tài)動詞的辨析need和dareNeed he go yesterday? 昨天他有去的必要嗎?I don’t think you need dare not go out alone at dare you say I’m unfair?She needs the work done before 。The table needs painting(to be painted.).I dare say he’ll e 和be able tobe able to 表示經(jīng)過努力后, 能夠做到。be able to 有多種形式的變化。can。、可能性。could 是can的過去式, 表示過去有能力及過去存在的可能性；用于疑問句表示委婉地提出問題。 fire spread through the hotel very quickly but everyone was able to get .—Will you stay for lunch?—Sorry, I can’ brother is ing to see tomust表示主觀意志，而have to表示由于客觀因素。I told her that she must give up had to get everything ready that to1）used to “過去常常”, 與現(xiàn)在事實(shí)相反。would表過去意愿。People used to think that the earth was would go out for a walk in the morning when she was in the ．情態(tài)動詞無論是表達(dá)“推測和可能性”，還是表達(dá)“虛擬”這一概念，只要是對過去已經(jīng)發(fā)生的事情進(jìn)行描述，一律用“情