【正文】
needed dare dared have to had to (二)情態(tài)動詞的種類:(見下表)原 形過去式詞 義cancould能maymight可以(或許)mustmust(had to)必須(不得不)willwould愿意shallshould應(yīng)該needneeded需要daredared敢于(三)情態(tài)動詞的否定形式:cannot can’t could not couldn’t may not mayn’t might not mightn’t must not mustn’t will not won’t would not wouldn’t need not needn’t shall not shan’t should not shouldn’t ought not oughtn’t dare not daren’t (四)常用情態(tài)動詞的用法:1.can與could1). can(1)表示體力或腦力方面的“能力”,也能表示根據(jù)客觀條件能做某事的“能力”。 He couldn’t climb up the mountain. The news could be true. (2)表示客氣地請求或委婉地陳述意見。 We didn’t know that he might be our new teacher. The accident might happen the day before yesterday. (2)替代may來表示現(xiàn)在時間的動作,主要于推測(但其可能性比may更低)。此時可用于各種人稱。 Will you please buy me an EnglishChinese dictionary when you go to the bookstore? Will you have some rice? 2). would(1)will的過去式,表示過去的意愿和決心。如: Would you like some fish? 吃點魚好嗎? 5.shall與should1). shall 征求對方意見或請求,用于第一、三人稱。 You should have told us the truth.(應(yīng)該告訴卻沒有) He should have known the importance of ) We shouldn’t have left so early.(不應(yīng)該早出來,可已經(jīng)做了) 6.need1)need意思是“需要,必須”,主要用于否定句和關(guān)系問句中。 You ought to visit us often. Sorry, I ought to leave now. 在表示“應(yīng)該”時,ought to的語氣比should要強,比must稍弱。t dare do that again! The poor girl dare not go home. 9.had better You had better see a doctor. You had better not leave now. Had I better wait for her? used to do / be used to doing / be used to do…used to do 表示過去常常發(fā)生的動作,強調(diào)過去,只用于過去,注意用 to do,不用doing形式;而be used to doing 意為“習(xí)慣做…”, be 可有各種時態(tài); be used to do 意為“……被使用去做……,” 為被動語態(tài)形式。 + 主語+動詞原形+….? 如:Can you repair the car? Could he be a good student?Will you please give me a call? ?。?) 對 will/ would you…(1) can’t可譯為“不會”, 如:I can’t play basketball. 我不會打籃球。He mustn’t leave his room. (2) mustn’t(1)needn’t 意為“ 不必” 。 另外 be able to 常常指經(jīng)過努力, 花費了時間和勞力之后才能做到某事。can 和may 表示可能性時的區(qū)別:1) can’t 和 mustn’t. must 和 have to need, dare 的兩種用法 need , dare 作情態(tài)動詞是, 多用于否定句、疑問句中,后接動詞原形。My father used to eating meat.She is used to