need,must用法及練習(xí)

1、n eed 用法一用作1. need sth.是 need 最常 的用法之一，后來的 能夠是名，也能夠是代。如:1). The soup n eeds salt.2). They donneed tfraid any more.3). Does he n eed any help?2. need doing 與 need to be done往常物做主,need 后邊可跟 名作,種狀況下 注意兩點：1.主形式的名doing 擁有被的含；2.名能夠改其 不定式的被 形式而句子的意 不。比如：4). The door n eeds painting.=The door n eeds to be p

2、ain ted.5). Your car n eeds repairi ng.=Your car n eeds to be repaired.3. need to do sth.作 ,need 后邊需要接 to 的 不定式,表示有 或任去做某事。如：6). What do we n eed to take for the party?7). Will we need to show our ID card?8). I n eed to take good care of my sister.二.用作情1.沒有人稱和數(shù)的 化。不主是第幾人稱，不主是數(shù)是復(fù)數(shù)，情都都無形式 化;2不可以獨充任。情

3、必與一個一同組成復(fù)合，而且個意 要始是 原形。3.否認(rèn)句只要在情 以后加not。9) . You neednt do it again 10) . He neednt worry about it .4.疑句只要將情提到主的前方。比如:11) . Need I type this letter aga in?12) Need I stay here any Ion ger?No, you n eed nt.Yes, you must.三.用作名need 作名，含“缺少，需要”；其復(fù)數(shù)表示“基本需要”。要掌握兩個：in (great) need of (急需)與 meet theneeds of

4、(足？的需要)。比如：13) . There s no need for you to try again.14) . The factory is in great n eed of fun ds.“n eed+have+do ne ”表示原來需要做某事而沒有做?！皀 eed nt+have+do ne”則表示 “原來不需要做某事而做了”。I n eed nt have bought so much wineonly five people came.He n eed have hurried to the stati on. In that case, be would nt have m

5、issed the train.you need not have said that“should+have+done ”意思是“原來應(yīng)當(dāng)做某事，而實質(zhì)沒做”表示 原來不該當(dāng)做某事，而實質(zhì)做了?！薄皊houldnt+have+done含有譴責(zé)對方或自責(zé)的含意。1. Tom, you are too lazy. The work should have been finished yesterday.2. Look, Tom is cryin g. I should nt have bee n so harsh on him.3 you should have told me“ must+ha

6、ve+done ”表示 對過去事情的必定推斷，譯成“必定做過某事”，該構(gòu)造只用于必定句。1. It must have rained last night, for the ground is wet.2. You must have been mad to speak to the servant.must的用法1. must 表示“必”、“”。比如：1We must protect our en vir onment.2Every one must obey the rule.2. must 的否認(rèn)形式 must not 表示“不”、嚴(yán)禁”、嚴(yán)禁”。氣比烈。比如：1You mustn sp

7、eak like that.2You mustn be late for school.3. 在回答 must 的 句，必定形式用 must 往返答，但否認(rèn)形式用 needn 或 don t have to 往返答。而 不用 mustn 往返答。比如：-ust I be home before 8 oclock?（8 點以前我必 回家？）- es, you must.No, you needn t./No, you don t have to.（是，你必）（不，你不用。）4. must 可表示 推，意思是“必定”、“必然”，一般只用于必定句中。分三種狀況：1. ）于在狀 的推，我用：must

8、+v.（狀 或系），比如：1He must be at home.他（準(zhǔn)在家里。）2There must be some children in the room（房 里準(zhǔn)有些孩子。）2. ）于在作的推，我用：must +be + doing （行），比如：1They must be clea ning their room. 他（準(zhǔn)是在打 房。）2He must be watching TV.（他準(zhǔn)是在看。）3. ）于 去事 的推，我用：must +have +去分，比如:1It must have rained last ni ght.（ 昨晚準(zhǔn)是下雨了。）2I didn hear the

9、 phonemust.l have been asleep（我沒有聽至 U ，我準(zhǔn)是睡著了。）Choose the right answer.()1. You_ any help, do you?A. dont need B. needn t. needD. doesnt need( )2. -Must I stay at the office this after noon? -No, you.A. don tB. needntC. dont need D. can t()3. Tomget up a little earlier tomorrow.A. n eedsB. n eedC. n

10、 eed toD. n eeds to()4. Need the doctor_with you toni ght?B. stay C. stays D. to stay()5. Look! Your shirt is so dirty. ItB. n eed to wash C. n eeds washi ng D. n eed wash the dema nd.B. meet the n eed ofA. stay ingA. n eed washi ng()6. The supply canA. meet n eed of()8. Your room is full of dust. I

11、t()9. Davidany thi ng to drink?A. Need, ?B. Needs, ? C. Does ? need D. Do ? need( )10. Youto the meeti ng tomorrow if you have someth ing importa nt to do.A. needn t to comeB. don t need comeC. don t need comingD. needn t come二.Fill in the bla nks using have to, have got to, must, should, ought to,

12、had better.1.You_ not get dow n un til the bus has stopped.2. They_ be en couraged to speak En glish after class.3. You ofte n_wait a long time for a bus.4. We_ go and see Mary tomorrow, but I don tthink we will.5.I_not miss my trai n.6.Whe n traveli ng, you_ take care of your health.7.ln some parts

13、 of the world, you_ boil the water before drinking it.8.lf you have a stomach pain, you_drink hot weak tea.9. You_ not swim immediately after a heave meal.10.You_ not wake me up whe n you come in.三. Tran slate1.他需要好好睡上一夜晚。2. 你需要剪發(fā)了。3. 我需要你查一下英語詞典。4. 你不用解說。5. 我想要知道我們能否要帶睡袋。6. 我們不用在雨里站看。7. 他昨天實質(zhì)上是不用去那邊的。C. meet the n eeds of().7. The hospital isA. in great n eed ofC. in great n eed wi