【文章內容簡介】 be now ? 他現(xiàn)在可能會在哪呢？Can the news be true ? 消息會是真的嗎？They must be playing basketball on the 。He can39。t be writing his 。對某個狀態(tài)或 過去發(fā)生的事情進行推測在情態(tài)動詞后加上 have done 例如：1）肯定的推斷：may have done , must have done2)否定的推斷：can39。t have done，couldn39。t have done3)疑問的推斷：can(could)have done例句： They may have settled the problem.(他們可能已經解決了這個問題。）I might have e to a wrong conclusion.(我可能得出了一個錯誤的結論。）The road idn39。t wet , It can39。t have rained last night.(路面沒濕，昨天夜里肯定每下雨。）Could Mary have missed the first bus ? She got up very early.(怎么瑪麗會趕不上車嗎？他起得很早的。）（三）幾個應注意的問題1）情態(tài)動詞+have done 可以表示對過去所發(fā)生事情的一種責備語氣。如：I could have done the work better.（我本來可以做得更好。自責自己沒有把事情做好，感到惋惜、遺憾）You should have thought of that.(你本應當想到這一點。責怪你沒有想到。should have done 表示本應該做而沒有做的事情。）You shouldn39。t have told them that.(你本不應當告訴他們那件事。shouldn39。t have done表示本不應該做而做了的事情。）You needn39。t have told them that.(你本不必告訴他們那件事。needn39。t have done表示本不必做而做了的事情。）2）情態(tài)動詞dare 和 need 還可以用作實義動詞。在肯定句中多用于實義動詞，在疑問句和否定句中多用情態(tài)動詞，用于實義動詞時有人稱和數(shù)的變化。例如：He needn39。t worry about us now.(他不必為我們擔心。need 為情態(tài)動詞）She dares to stay at home alone at night.(夜里她敢獨自一人呆在家里。dares 為實義動詞。)練習 can even write a little Chinese we ask you some questions now , Mr White ? 39。re quite right , must stop the who would send their children to an unknown young woman ? will not listen to any I return these books to the library ? dare you say I39。m unfair ? 8.“You needn39。t climb the tree , ” his mother news may be true, of it be Susan ?No , it can39。t be has gone to 39。s ten o39。 think she may have gone to ： 能力 請求 必須 愿意 必要 可能（表推測）（可能，表推測）, can39。t（不可能，表推測） 可能（表對過去事情 的推測） you explain the sentence again ? _____ hand in your exercise book in at may hand it in on _____ play the piano well when she was quite I clean the classroom before three o39。clock ?No, you needn39。 ____ rain you please show us some photos ? soldier shot his _____ have been tree is ________have given it more _____ be writing their positions in the classroom saw them in the he have finished the work ? I don39。t think ： 39。t 1． Where can he ______(be)now ? There’s something important to tell him at ． He can’t ________(hear)us because there was terrible noise from the ． What he is saying may not _________(be) don’t think she is such a kind of ． “ What do you think that noise was ? “ “ It might _______(be)a cat.”5． There must ________(be)something wrong with my you help me to fix it ? 6． The girl must _______(leave)for don’t see her anywhere on the ． She ought to ________(have)his was his girl friend at ． Haven’t you got the tickets ? You oughtn’t to ________(have)any difficulties in getting ． That will ________(be)the usually es at this ． Sorry to be so will _____(wait)for some ． It should _____(be)somebody never stays in the lab so ． She should _______(receive)the sent it five days ： heard been left had waited received一、單項選擇 you swim in the river?No, I 39。t not 39。t 39。t I go swimming now? No, you may have a rest 39。t 39。t not 39。t, where is your father?I39。m not in his be visit Lucy on Sunday, Mum?Yes, 。can 。may 。need 。need is Tom?He hasn39。t e to school think he________ be to I go there with you?Yes, you book _____ Lucy39。!Her name is on the book be be 39。t be 39。t be二、填空用所給動詞的正確形式填空。(1)Why isn39。t Jim here?He39。s ___________(take)care of his a