新版牛津初中英语8AUnit 4 Do it yourself-- Grammar课件.ppt

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1、GrammarUnit4Turnleft!GuessingGameTurnright!GuessingGameWalkonthezebracrossing!GuessingGameGuessingGameDon’tsmoke!Nosmoking!GuessingGameDon’tparkyourcar!GuessingGameDon’tpicktheflowers!Readandobserve(观察)Turnleft!Turnright!Walkonthezebracrossing!Don’tsmoke!Don’tparkyourcar!D

2、on’tpicktheflowers!Theyareallimperativesentences.（祈使句）句子祈使句的结构如下：dosthDon’tdosth.肯定：否定：祈使句表示请求、命令、建议等等。谓语动词一律用原形。句子中通常不用主语，句末用感叹号或者句号。Drawtheconclusion(得出结论)祈使句句式详解1. 肯定的祈使句（1）动词原形+其他Stand up, please. = Please stand up.  请起立。（2）Be + adj.Be careful! = Look out! = Take care!

3、 小心 / 当心！（3）Let's + 动词原形Let’s go to school together.  咱们一起上学去吧。祈使句句式详解2. 否定的祈使句（1）Don't + 动词原形Don't stand up. 别站起来。Don't be careless. 别粗心。     Don't let them play with fire. 别让他们玩火。（2）Let's ( let sb ) + not + 动词原形Let's not say anything about it. 对于这件事，咱们什么也别说。Let them not 

4、play with fire. 别让他们玩火。祈使句句式详解与please连用,使语气委婉为使语气委婉，通常将祈使句与please连用。Please可用于祈使句的句首，通常不用逗号如果用于句末，前面通常用逗号。如：Pleasedon’tgetangry.请不要生气。Pleasedrivemoreslowly.请开得慢一点。Trytobequiet,please.请设法保持安静。Putupapictureonthewall.Putupashelfonthewall.TrytogiveinstructionsDon’tswimhere.Don’

5、tparkyourbikehere.Parkyourbikehere.Pleasegoslowly.Don’tsmokehere.Don’tfishhere.Bequiet,please.Don’tmakeanynoise.Howtomakecards1.Cutoutthecard.2.Writesomewordsonthecard.Howtomakecards3.Drawapictureontheothersideofthecard.4.Lookatthepictureandtrytosaywhatisontheotherside.Don

6、’tgiveup.Keeptrying.1--It’sherbirthdaynextweek.--Then___________heraboutthesurprisebirthday.(tell)2–HowcanIgettoPeople’sHospital?--_____alongthestreetand______leftatthelights.don’ttellturnGoExercises3--Wehavetofinishtheworkintwohours.--Thenlet’s__________anytime.(waste)4--

7、____________somuchnoise,please.--Ok.(make)notwasteDon’tmakeUsingshouldandhadbetterWeuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.Thetoneofhadbetterisstrongerthanshould.had better do sthhad better not do sthIt is pretty cold. You'd

8、 better put on my coat.She'd better not play with the dog.shoulddosthshouldnotdosthYoush