Unit 2 语法（知识清单） -2023-2024学年英语三年级下册单元速记·巧练系列（译林版三起）

Unit2Inthelibrary语法精讲精练(含答案)一、否定祈使句1.否定祈使句否定祈使句一般用来表示劝告、禁止或警告等。基本结构为:Don't+动词原形(+其他).意为“不要做某事”。回答可以是“I’msorry./Allright./OK./Yes.”等。如:Don'tshoutinthelibrary.不要在图书馆喊叫。2.确定祈使句变否定祈使句(1)通常在确定祈使句的动词前面加“don’t”。如:Run!快跑!→Don’trun!不要跑!(2)let引导的祈使句，否定形式在动词前加not。如:Let'sgotothezoo我们去动物园吧。→Let’snotgotothezoo.我们不要去动物园。3.否定祈使句的其他形式(1)No+动词-ing.如:Noparking.禁止停车。Nosmoking.禁止吸烟。(2)No+可数名词复数.如:Nophotos.禁止拍照。语法提优练1一、单项选择。()1.________eatontheunderground.A.No B.Not C.Don't()2.—Don'ttalkhere.—________A.Yes,please. B.I'msorry. C.Hownice!()3.________thewindow.It'stoocold.A.Pleaseopen B.Don'topen C.Don'tclose二、按要求完成句子。1.Talkinclass.(改为否定句)________________inclass.2.Don'tlistentotheparrot.(改为定句)________________theparrot.3.Openthewindow,please.(写出义句)________thewindow,please.二、用“Wouldyoulike...?”征求对方意见1.含义“Wouldyoulike...?”用于询问对方是否情愿做某事或是否想要某物，意为“你情愿⋯吗?/你想要吗?”。“Wouldyoulike”后面既可以加名词、名词短语“Wouldyoulike”又可以加不定式“todosth.”。意为“想要去做某事”如:Wouldyoulikeanicecream?=Wouldyouliketohaveanicecream?你想吃个冰淇淋吗?2.回答对“Wouldyoulike...?”进行回答时确定回答为“Yes,please.”,意为“好的,太感谢了。”否定回答为“No,thanks/thankyou.”,意为“不了,感谢。”如:—WouldyoulikeanewT-shirt?你想要一件新T恤衫吗?—Yes,please.好的,太感谢了。/No,thanks.不了,感谢。3.wouldlike与wantwouldlike中的would是情态动词。可将wouldlike看作一个整体,此时它的用法与want类似。询问对方是否想要某物时,还可以用“Doyouwant...?”。如:Wouldyoulikeacake?=Doyouwantacake?你想要一个蛋糕吗?语法提优练2一、用所给单词的正确形式填空。1.________(would)youlikeanapplepie?2.________(do)yoursisterlikeanimals?3.Johnwouldlike________(have)somewater.二、推断下列情境与所给句子是(T)否F)相符。()1.当你想知道对方是否想要一颗糖果时,你会说:CanIhaveasweet?()2.妈妈给你一个苹果，但你不想吃,你会说:No,thankyou.三、依据上下文和首字母提示，填写正确的单词补全对话。A:Hello,YangLing.B:Shh!Don'ts________inthelibrary,WangBing.A:I'ms________.W________y________likeahotdog?B:No,t________.Don'te________here.A:OK.W________a________somewater?B:Yes.Butdon'tt________again.三、want的用法want作动词,意为“想要”,用法如下：1.wantsth.,意为“想要某物”。sth.是something的缩写形式,一般指名词:apple、pencil、rubber、book等。如:Iwantanewjacket.我想要一件新夹克衫。Doyouwantanegg?你想要个鸡蛋吗?2.wanttodosth.意为“想要做某事”。do指的是动词原形，表达主语想要做的动作。如：Shewantstosleep.她想睡觉。3.wantsb.todosth.意为“想要某人做某事”。sb.是somebody的缩写形式,是want的宾语。如:Iwanthimtoeatthiscake.我想要他吃这个蛋糕。Lisawantsmetocome.丽莎想要我来。语法提优练3一、单项选择。()1.Mybrotherwants________asweet.A.eat B.toeat C.eating()2.Wouldyou________somemilk?A.have B.want C.like()3.Doyou________somemilk?A.want B.wantto C.towant()4.Mymumwantsme________thewindow.A.close B.toclose C.closeto二、从方框中选择合适的句子补全对话。A:1.________A.Yes.IlikeA.Yes.Ilikeapplepies.B.Doyoulikehotdogs?C.Goodmorning,Alice.D.Wouldyoulikesome?A:2.________B:No,Idon't.A:Whataboutapplepies?B:3.________A:Look!Ihavesomeapplepies.4.________B:Yes,please.Yummy!参考答案(一)否定祈使句一、1.C2.B3.B二、1.Don'ttalk2.Listento3.Close(二)用“Wouldyoul