2018年秋九年级英语上册Unit3Safety语法聚焦三新版冀教版.doc

2Unit3Safety1.LookatthisyellowstarBrianandJenny!布莱恩、詹妮看这颗黄色的星星！2.Letmegettheladderforyou.让我给你拿把梯子。3.Don'tstandonchairs.不要站在椅子上。4.Becarefulwithscissorsandknives!小心剪刀和刀子！5.Neversmokebecauseofmuchpressure!永远不要因为压力大而吸烟！1.定义祈使句是英语中的基本句型之一用来表达建议、命令、请求、警告、劝告、禁止等语气。祈使句的主语一般为第________人称通常可以________。为了使语气更加客气或缓和可在句前或句末加上________一词。2.构成(1)祈使句的肯定形式一般以________动词或________动词原形开始也可以以动词let开始。(2)祈使句的否定形式一般在句首加________或________。(3)以let开头的祈使句：肯定句：Lethimcomein.否定句：Don'tlethimcomein.或Lethimnotcomein.(4)有些祈使句可用No开头表示禁止。Nosmokingplease.请不要吸烟。Nophotos!禁止拍照！3.拓展(1)祈使句的反意疑问句①祈使句的反意疑问句若陈述部分是否定句则附加问句只能用willyou。若陈述部分是肯定句附加问句既可用willyou也可用won'tyou。②let's开头的祈使句用于提出建议包括对方其附加问句用shallwe。letus开头的祈使句表示征求对方许可其附加问句用willyou。Don'tdothatagainwillyou?Gowithmewillyou/won'tyou?Let'sgoshallwe?Letustakeanexamwillyou?(2)祈使句用于两个重要句型①“祈使句＋and＋表结果的陈述句”用来叙述肯定的条件。②“祈使句＋or＋表结果的陈述句”用来叙述否定的条件。[注意]这两个句型都可以改写为if引导的条件状语从句。Workhardandyouwillpasstheexam.(＝Ifyouworkhardyouwillpasstheexam.)Workhardoryouwillnotpasstheexam.(＝Ifyoudon'tworkhardyouwillnotpasstheexam.)Ⅰ.单项选择()1.2017·白银Boysandgirls________learningandhavefun.A．keepB．tokeepC．keepingD．kept()2.________carefullyplease!Lookattheroadsign.Thereisaschoolahead.A．DriveB．TodriveC．DrivingD．Drives()3.________patientwithhimplease.Heisonlythreeyearsold.A．Don'tB．BeC．IsD．Does()4.2017·渝北________throwingthosestonesplease.A．StopB．StopsC．StoppingD．Stopped()5.2017·安徽Holdyourdream________youmightregretsomeday.A．andB．orC．butD．so()6.2017·滨州—IwanttobeateacherwhenIgrowup.—Workhard________yourdreamwillcometrue.A．orB．butC．thoughD．andⅡ.按要求完成下列各题1.2017·达州Thiswarningsigntellsusnottopickflowers.(保持句意基本不变)Thiswarningsignsays“________________flowers”．2.2016·天水Tellhimthetruthatonceorhewillbeangry.(改为主从复合句)________________don'ttellhimthetruthatoncehe