1、Section Grammar need 的用法语法图解探究发现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 social skills.Need I do the home
2、work 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.我的发现(1)句中黑体部分表示“没有必要做某事，而实际上也没做”；句中黑体部分表示“本没有必
3、要做某事，而实际上却做了”。(2)句中 need 为，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，否定回答用或。(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。情态动词mustneedntdont have toneed to be done一、need 的用法1用作实义动词(1)有人称和数的变化，其第三人称单数形式为 needs，变为否定句或疑问句时要用助动词 do/does/did。(2)后跟名词、代词、不定式或动名词作宾语，当 need 的主
4、语与need 后面的动词之间是被动关系时，need 后面接不定式的被动形式或动名词的主动形式。You dont need to worry about me.你不必担心我。The room needs cleaning/to be cleaned,but I only have time on Sunday.房间需要打扫，但是我只有星期天有空。2用作情态动词(1)need 表示“需要”或“必须”，通常用于否定句和疑问句。You neednt do it again.你不必再做了。Need he do his homework first?他需要先做作业吗？(2)由 must 引起的一般疑问句中
5、，否定答语可用 neednt,意为“没必要”。Must I do the work now?No,you neednt.我现在必须做这项工作吗？不，你不必。(3)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 go there too?Yes,you must./No,you neednt.我也需要去那儿吗？是的，你必须去。/不，你不必去。即时演练1 完成句子He is only a meter tall,so he (不需要)a ticket.We (需要确保)that our plan will be well carried out.You (没必
6、要浇花)because its going to rain.There is something wrong with my bike,so it (需要修理)Must we hand in our exercise today?No,you (不必).You can hand it in tomorrow.doesnt needneed to make sureneednt/dont need to water the flowersneeds repairing/to be repairedneednt二、didnt need to do 与 neednt have done 的区别1di
7、dnt need to do 表示“过去没必要做某事，实际上也没做”。You didnt need to buy the book;it was complex to understand.你不必买那本书；它太复杂了，很难懂。Marys boyfriend drove to pick her up,so she didnt need to take a taxi.玛丽的男朋友开车去接她，因此她没必要打出租车了。2neednt have done表示“过去没必要做某事，而实际上做了”。You neednt have washed those clothes;we have a washing m
8、achine to do that sort of thing.你本不必洗那些衣服的，我们有台洗衣机可以洗衣服。I neednt have cooked so much food,but I didnt know nobody was hungry.我本没必要弄那么多吃的，但我当时不知道谁也不饿。名师点津 didnt need to do sth.仅仅陈述过去的情形；neednt have done sth.含有惋惜、遗憾、后悔等含义。即时演练2 完成句子You (本不必这么匆忙).There is plenty of time.He (没必要早起),so he stayed in bed u
9、ntil 10 oclock.My friend sent me the book,so I (没必要给他写信)to ask for it.I dressed very warmly for the trip,but I(本没必要这么做)because it was very hot.neednt have hurrieddidnt need to get up earlydidnt need to write to himneednt have done so链接高考完成句子1(2019天津高考改编)学会批判性地思考是当今孩子为了未来(的发展)将需要的一项重要技能。Learning to t
10、hink critically is an important skill todays children.2(2019江苏高考改编)医生把他的电话号码告诉给病人，以防他们需要医疗援助。The doctor shares his phone number with the patients medical assistance.will need for he futurein case they need3(2017天津高考改编)我的房间里乱糟糟的，不过我今天晚上出门之前没必要打扫，我可以(明天)上午再打扫。My room is a mess,but I it before I go out
11、 tonight.I can do it in the morning.4(2016北京高考改编)我喜欢周末，因为周六周日我不必早起。I love the weekend,because I on Saturdays and Sundays.neednt/dont need to cleanneednt/dont need toget up early5(2015天津高考改编)来新学校前我本没有必要担心的，因为这里的同学都对我很友好。I before I came to the new school,for my classmates here are very friendly to me.
12、6(2014重庆高考改编)我已经订了一些比萨饼，所以当我们到家疲惫时就不必担心做饭的事了。Ive ordered some pizza,so we cooking when we get home tired.neednt have worriedneednt/dont need toworry about演练提能.单句语法填空1It was Sunday,so my eightyearold son didnt need (go)to school.2She has been waiting here for nearly an hour.She neednt (arrive)so earl
13、y.3I didnt need (clean)the window,because my sister had already cleaned it.4The classes were canceled due to the terrible typhoon,so the students didnt need (go)to school.to gohave arrivedto cleanto go5You neednt (write)such a long article.Three hundred words are enough.6Thank you very much for clea
14、ning the house,but you neednt(do)it,because I can manage it by myself.7You dont need (tell)us what youre thinking at each step.8Mark (need)to learn Chinese because his company is opening a branch in Beijing.9To be a winner,you need (give)all you have and try your best.10The grass has grown so tall t
15、hat it needs (cut)have writtenhave doneto tellneedsto givecutting/to be cut.完成句子1你本来没必要那么匆忙地赶到公司，因为会议已经取消了。You to the company in a hurry,because the meeting has been called off.2父亲把文件寄来了，所以我不必为此给他写信了。Father sent me the document,so I to him for it.3不需要用闹钟来叫醒我，因为每天早晨六点钟，火车就从我家附近经过。I a clock to wake me
16、 up because at six oclock each morning the train comes by my house.neednt have gonedont need to writeneednt/dont need to use4如果你不想告诉我，可以什么也不说。You me anything if you dont want to.5我不必担心我的周末，我总是在周末来临前就计划好了。I my weekend I always have my plans ready before it comes.neednt/dont need to tellneednt/dont need to worry about谢谢 观 看