2022屆高考英語情態動詞和虛擬語氣

　　the fine shall be given in cash.罰款須以現金繳納。
should  意義
 ①（表義務、責任的）應該
 ②（表預期的）應該會，想必會，一定……會把
 ③（表驚訝、遺憾的）竟然、居然
 ④（與疑問詞連用，表意外、驚訝、納悶等的）究竟是，到底
 ⑤（用于表示命令、建議、請求等詞后面的that從句中，且should可以省略）應該，必須
　　①you should apologize to him.
　　②the photos should be ready by 12:00.
　　③i’m surprised that you should speak in such a way.
　　④who should ccome in but my old friend betty.我當究竟是誰進來了呢，原來是我的老朋友貝蒂呀。
　　⑤i suggested that he (should)change his mind.
　　my suggestion was that he (should)change his mind.
　　注意：ought to表示 “應該” (與should同義, 只是語氣稍重一些), 也可表示推測。
　　you ought to take care of him.
　　he ought to be home by now.
　　8.will/would
　　①請求、建議，would比will委婉客氣
　　would you pass me the book?
　　②表示意志、愿望和決心
　　i will never do that again.
　　they asked us if we would do that again
　　③可表示過去反復發生的動作或某種傾向
　　during the vacation he would visit me every week
　　the wound would not heal.
　　④表示估計或猜想
　　it would be about ten when he left home.
　　what would she be doing there?
　　9.dare和need
　　①need作為情態動詞只有一種形式，只用于否定句和疑問句。
　　②dare作為情態動詞用時有兩中形式：dare和dared兩個詞形。
　　除了可以用于否定句和疑問句外，還可以用于條件從句或表示懷疑的句子中。
　　if he dare come,i will kick him out.
　　i don’t know whether he dare say.
　　note:he doesn’t dare(to)answer the question.
　　does she dare(to)enter the dark room?
　　10.情態動詞+have done的用法
　　①could+have done：本可以做而實際上未能做
　　you could have done better, but you didn’t try your best.
　　②cannot+have done：表示對過去行為的否定推測
　　he cannot have been to that town.
　　③can+主語+have done：表示對過去行為的懷疑或不肯定
　　can he have got the book?
　　④might(may)+ have done：對過去發生的行為不太肯定的推測
　　he may not have finished the work.
　　if we had taken the other road, we might have arrived earlier.
　　(mood:might>may,possibility:might<may)< p>
　　⑤must+have done：對過去發生的行為肯定的推測。其否定式為：cannot have done
　　you must have seen the film.
　　you cannot have seen the film.
　　⑥needn’t+have done：本來不必要做的而實際上又做了
　　you needn’t have watered the flowers,for it is going to rain.
　　注意：didn’t need to(have to)do :沒有必要做而實際上也沒有做
　　i didn’t need to clean the windows.my sister did it 2 hours ago.