祈使句笔记

祈使句

1.定义：表示命令或请求对方去做某事。

PS: ①“对方”指的是you ②“做”表示有动词会出现

2.特点：①无人称：eg: Sit down. Stand up.

PS: 这些句子都是无人称的

②只有两种句型：肯定句/否定句

3.祈使句的肯定句表达方式：

（1）直接用“动词原型”开头

eg①: Give that book to me, please.

eg②: Come here and sit down.

（2）开头用“Please”

eg①: Please give that book to me.

eg②: Please come here and sit down.

PS: ① please + 动词原型②“please”后面没有逗号。

（3）开头可以是人名

eg①: Tom, give that book to me.

eg②: Kelly, come here and sit down.

PS: 人名后面要加逗号，之后跟动词原型。

4.祈使句的否定句表达方式：

eg①: Please give that book to me.（改否定句）

→ Please don’t give that book to me.

PS: 因为祈使句永远是和“你/你们”在说话，所以只要用”don’t”。

eg②: Kelly, pass me the salt.（改否定句/让学生练习）

→ Kelly, don’t pass me the salt.

5.祈使句和can / can’t互换

（确认概念：祈使句的肯定句→can；祈使句的否定句→can’t）eg①: Cross the street, please.（同义句互换）

→ You can cross the street.

PS: ①确认祈使句是肯定句，所以用can来互换

②有can的话，前面肯定是人称代词”you“

eg②: Don’t cross the street, please. （同义句互换）

→ You can’t cross the street.

PS: ①确认祈使句是否定句，所以用can’t来互换

eg 3: Please don’t put your books here, Kitty.

→ You can’t put your books here, Kitty.

PS: 确认祈使句是否定句，所以用can’t来互换。.

Ex: 同义句互换

(1)Give the ruler to me.

(2)Don’t ride a bike in the garden.

(3)Don’t close the door, please.

(4)Put the book on the desk, Kitty.

(5)Fly the kite in the park, Peter.

Ex: 改句型（肯定、否定互换）(1)Go to the door, please.

(2)Don’t look at her.

(3)Please put it here.

(4)Please fly your kite in the garden, Lucy.

(5)Don’t stand there.