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1、Section Grammar,,探究 語法精要,didnt need to do與neednt have done,,一、didnt need to do和neednt have done didnt need to do和neednt have done兩結(jié)構(gòu)都有“過去不必做某事”之意。但didnt need to do是指“過去沒必要做，實(shí)際上也沒有做”；而neednt have done則表示“過去雖然沒必要做，但已經(jīng)做了某事”。 I didnt need to buy a gift for my son because I already had one.我不需要為兒子買禮物，因?yàn)槲?/p>

2、已經(jīng)有一份了。 I didnt need to clean the window.My brother did it. 我沒有必要擦窗戶，我哥哥擦了。 I neednt have told him about the news because he had known about it.我沒必要告訴他這個(gè)消息，因?yàn)樗呀?jīng)知道了。,2表示對(duì)過去事情的抱怨或后悔,ought to have done 本來有義務(wù)做而沒有做某事 should have done 本來應(yīng)該做而未做某事 could have done 本來能夠做而沒有做某事 need have done 本來需要做但未做某事 needn

3、t have done 本來沒必要做但做了某事,You ought to have cleaned the room.After all，you were on duty yesterday.你本應(yīng)該清理房間。畢竟，昨天該你值日。 You should have been more careful just now. 你剛才應(yīng)該更小心些。 Oh，Mom！You neednt have prepared so much food.Dad and Diana will not come back for supper. 噢，媽媽！你本不必做這么多飯。爸爸和戴安娜不回家吃晚飯了。,,課時(shí) 語法專練,

4、.單句語法填空 1It is obvious that the garden needs________________ (water) 答案：watering/to be watered 2We dont need________________(get) into an argument over this. 答案：to get 3It is said that he need not____________(take) the exam. 答案：take,4A dog needs______________(take) out for a walk every day. 答案：takin

5、g/to be taken 5I was the first to go there.I__________________(go) there so early. 答案：neednt have gone 6I offered to help him with the housework and then he told me he had finished.I______________________(do) that. 答案：neednt have done,7My American friend Tom spoke good Chinese，so I didnt need_______

6、_______(translate) the speech for him. 答案：to translate 8Mark________________________(hurry)After driving at top speed，he arrived half an hour early. 答案： neednt have hurried,.完成句子 1I__________________________(不需要打出租車)；its within walking distance.So we walked there. 答案：didnt need to take a taxi 2It tu

7、rned out to be a small house party.We ________________________(沒必要盛裝打扮) 答案：neednt have dressed up 3They__________________________(不需要做) it themselves，so they went home in advance. 答案：didnt need to do,4We__________________________(沒必要如此匆忙)There is still an hour left. 答案：neednt have so hurried 5Need he______________________________________(完成作業(yè)) first? 答案：finish his homework 6Must I tell Mary about it? No，you__________________(沒必要)Ive told her already. 答案：neednt,,,謝謝觀看！,