英语祈使句的用法.doc

。祈使句1、定义：祈使句是用来表示请求、命令、劝说、号召、警告等的句子。 在祈使句中，通常省略第二人称主语you，以动词原形开头。句末一般用句号；表示较强语气时，则用感叹号。2、类型：1、V型：动词原形 + 其他 2、Be型： Be + 形容词 3、Let 型：Let sb + 其他 4、No 型： No+ v-ing / n3、注意：表示委婉、客气时，常加please(可放句首，句末) 祈使句的否定形式：一般在句首加dont Let型的祈使句变否定句，可在句首加dont, 或在动词原形前加not.4、祈使句用法口诀祈使句， 祈使句，请求命令或建议。主语是you常省去，动词原形开头记。否定形式加Dont，Let否定有两种。想更客气please, 句首句末没关系。练习I. 用括号内所给动词的适当形式填空。1. Its an important meeting. _(not,be )late.2. _ (not,make) any noise! Yourmother is sleeping.3. _ (not, speak) with your mouthfull of food and _ (be) polite.4. _ ( not, talk) and _ (read) aloud.5. _ (not,leave) your homework for tomorrow, Larry.6. _ (look) out! A car is coming.7. _ (give) us ten years and justsee what our country will be like.8. _ (not, let) the baby cry.9. Lets _ (not, say) anything about it.II. 选择填空( )1 .Her doctor said: “_ work so hardA StopB DontC CantD No( )2. Cindy, _ to be here at 8 oclockA is sureB is sure thatC will be sureD be sure( )3._ when you cross the roadA Do careB CareC Be carefulD To be careful( )4. _him the secret, will you？A Dont tellB Not to tellC Not tellingD No telling( )5. _ in bed. Its bad for your eyes.A Not to read B Dont readC Dont to read D Not read( )6. _ your child. Well look after him.A Not to worry aboutB Dont worry aboutC Not worry for D Dont worry with( ) 7. _ tell a lie.A HardlyB NotC NoD Never ( )8.Please _ look outside. Look at the blackboardA not