1、Section Grammardidnt need to do和neednt have done语法图解课文原句感知I didnt need to get a visa.It was an informal party so I didnt need to wear a suit.You neednt have spoken so slowly.You neednt have watered the flowers, for its going to rain.You neednt worry about situations like these if you have good socia
2、l skills.Need I do the homework first?Yes, you must./No, you neednt/dont have to.I need to know what I can talk about with the Chinese people that I meet.You dont need to take a gift.Do I need to leave my telephone number and address?The door needs oiling.The door needs to be oiled.语法领悟(1)句中黑体部分表示“没
3、有必要做某事，而实际上也没做”；句中黑体部分表示“本没有必要做某事，而实际上却做了”。(2)句中need为情态动词，而句中need则为实义动词。(3)由句可知，在回答带有情态动词need的提问时，肯定回答用must，否定回答用neednt或dont_have_to。(4)由句可知，当主语是表示“物”的名词时，用作实义动词的need后接动名词的主动形式表示被动含义。即need doing相当于need_to_be_done。一、didnt need to do与neednt have done的区别1didnt need to do表示过去没必要做而事实上也没做某事。need为实义动词。2nee
4、dnt have done表示过去没有必要做某事，但实际上却做了，常译为“本没有必要做”。need为情态动词。I got up early, but I neednt have done so, because I had no work to do that morning.我起床起得很早，但我本来不必起那么早的，因为我那天早上没什么事做。I didnt need to get up early this morning, so I stayed in bed until 9 am.今天早上我不必早起，所以我一直睡到上午九点钟才起床。名师点津 didnt need to do sth.仅仅陈
5、述过去的情形；neednt have done sth.含有惋惜、遗憾、后悔等含义。即学即练1(1)用所给词的适当形式填空He neednt_have_told (tell) me about it. Ive been told already.I didnt_need_to_ring (ring) the bell, because the door was open when I got to it.We went to the station by taxi. But we neednt_have_done (do) so; it was so near.You didnt wear t
6、he thick sweater, did you?Yes, but I neednt_have_worn (wear) it. It turned out to be quite warm.I didnt_need_to_go (go) to the office yesterday so I went shopping with my mother.(2)完成句子They didnt_need_to_do_it_themselves,_so they went home in advance.他们不需要自己去做，所以他们提前回家了。We neednt_have_so_hurried. Th
7、ere is still an hour left.我们本没必要那么匆忙，还有一个小时的时间。We didnt_need_to_take_a_taxi;_its within walking distance.我们不需要打出租车，步行就可以到达。二、need的基本用法1need用作实义动词(1)need作实义动词时，后面可跟名词、代词、不定式、动名词及复合结构。You dont need to worry about me.你不必担心我。They badly needed a change.他们迫切需要一次变革。(2)当need的主语与need后面的动词是动宾关系时，动名词的主动形式表示被动含
8、义，即need doing相当于need to be done。The flowers need watering/to be watered.这些花需要浇水。即学即练2(1)用所给词的适当形式填空The room needs cleaning/to_be_cleaned (clean), but I have time only on Sunday.They didnt need to_arrive (arrive) so early.Dr Smith said that he needed (need) no payment for his journey.(2)完成句子Since you
9、 know it already, we dont need to keep it a secret.既然你已经知道了，我们就没有必要保密了。These students badly needed an improvement in selfconfidence.这些学生迫切需要增强自信心。2need用作情态动词(1)need表示“需要”或“必须”时，通常用于否定句和疑问句。Need you go so soon?Yes, I must.你需要这么快就走吗？是的，我必须走了。You neednt finish that work today.你今天不必把那项工作做完。Need he do th
10、is housework first?他需要先做这些家务活吗？(2)在need引起的一般疑问句中，肯定回答用must，否定回答用neednt。Need I answer the question?Yes, you must./Yes, you have to./No, you neednt.我需要回答那个问题吗？是的，你必须回答。/是的，你得回答。/不，不必了。即学即练3(1)用所给词的适当形式填空My room is a mess, but I neednt (not need) clean it before I go out tonight.Must I tell Mary about
11、it?No, you neednt (not need). Ive told her already.Need I pay (pay) for the broken glass?(2)完成句子Need I come tomorrow?Yes, you_must./No, you_neednt.我明天需要来吗？是的，你必须来。/不，你没必要来。You neednt_come if you are busy.如果忙， 你就不必来了。I wonder if I_need_bring_a_camera with me.我想知道是否需要带相机。链接高考单句语法填空1(2018江苏)Its strange
12、 that he should have taken the books without the owners permission.2(2018天津)I cant find my purse, I could/might_have_left (leave) it in the supermarket yesterday, but Im not sure.3(2017北京)Samuel, the tallest boy in our class, can easily reach the books on the top shelf.4(2016北京)I love the weekend, because I neednt get up early on Saturdays and Sundays.5(2015天津)I neednt have worried before I came to the new school, for my classmates here are very friendly to me.6(2014重庆)Ive ordered some pizza, so we neednt worry about cooking when we get home tired.
