外研版-必修四-module-2-语法--祈使句-课件-(14).ppt

1、课文 16页 Turn right.Dont go faster than 90 kph.Dont turn left./No left turn.Dont stop./No parking.Dont walk./No pedestrians.advice instructionspermissioninformationinstructionsDOS Switch off the motor follow the rules of the road keep cool DONTS leave the motor on blow your horn break the rules of the

2、 road Listen to me carefully.Come in and sit down,please.Dont close the window its hot.Be quiet!Lets try our best to improve our environment.Do 型（以行为动词原形开头）Stand up!Dont stand up!/Never stand up!Be 型（以be动词开头）Be careful.Be quiet!Let型（以let开头）Let him in.Dont let him in.祈使句是用来提出祈使句是用来提出命令、请求、建议命令、请求、建议等

3、的句子。等的句子。一般不出现主语，谓语动词用原形，句末用句一般不出现主语，谓语动词用原形，句末用句号或感叹号。号或感叹号。LetLet me help you.me help you.让我来帮你。让我来帮你。KeepKeep off the grass off the grass！勿踏草坪！勿踏草坪！BeBe careful careful！当心！当心！应注意的几个问题：应注意的几个问题：祈使句的主语通常为祈使句的主语通常为youyou，一般不出现，一般不出现。但若要但若要强调主语强调主语，或表示急躁、厌烦、不高兴、，或表示急躁、厌烦、不高兴、愤怒等愤怒等感情色彩感情色彩，或表示，或表示向某人

4、向某人请求或发出命请求或发出命令，祈使句中可带主语。令，祈使句中可带主语。YouYou mind your own business mind your own business！你不要多管！你不要多管闲事！闲事！YouYou lead her to the garden.lead her to the garden.你带她去花园。你带她去花园。祈使句的否定式一般是在谓语动词前加祈使句的否定式一般是在谓语动词前加do notdo not或或dontdont，有时有时也用也用nevernever；若祈使句有主语，否定词若祈使句有主语，否定词dontdont或或nevernever要置要置于主语之

5、前。于主语之前。1.Do not1.Do not come in unless e in unless asked.非请莫入。非请莫入。2.Never2.Never be late again next time be late again next time！下次不！下次不要再迟到了！要再迟到了！Do sit down.Do write back when you receive his letter.Tom,you clean the room.Dont you be late again next time!加强祈使句语气的方式:在谓语前+do/youOpen the window,pl

6、ease.Will you go fishing with me this afternoon?Would you do me a favor?Could you show me how to get to the railway station?Hand the dictionary to me,will you?Lets go out for a walk,shall we?Why dont you get something to drink?这种附加问句不表示反问，而表示一种语气。这种附加问句不表示反问，而表示一种语气。1.1.Dont tell anybody about itDon

7、t tell anybody about it，will you?will you?不要把这件事告诉任何人，好吗？不要把这件事告诉任何人，好吗？2.2.Lets go out for a walkLets go out for a walk，shall we?shall we?我们出去散散步好吗？我们出去散散步好吗？3.3.Let us go and get some foodLet us go and get some food，will you?will you?让我们去买点吃的，好不好？让我们去买点吃的，好不好？4.4.Have a cup of teaHave a cup of tea

8、，wont youwont you？喝杯茶吧，？喝杯茶吧，行不行？行不行？Will you?Will you?在此句型中，祈使句表示条件，陈述句表示结在此句型中，祈使句表示条件，陈述句表示结果。果。and and 表示顺承结果，表示顺承结果，or or 表示转折关系表示转折关系1.1.Dont moveDont move，oror Ill fire.Ill fire.别动，否则别动，否则我开枪了。我开枪了。2.2.StayStay in house,in house,andand youll be safe.youll be safe.呆在家里，你就不会有危险。呆在家里，你就不会有危险。3.Hurry up3.Hurry up，or you will be late.or you will be late.=If you dont hurry up,you will be=If you dont hurry up,you will be late.late.三维设计 30页课后强化训练