Section Ⅳ　Grammar & Writing

　　祈使句

　　阅读下列句子，体会黑体部分的用法

　　1．Don't bring your cellphone to school.

　　2．Never forget each of us is the master of the earth.

　　3．Give me a ring as soon as you get home.

　　4．Write to me as soon as possible，will you?

　　5．Let's live a low­carbon life，shall we?

　　6．Let us take care of the house while you are away，will you?

　　7．You，girls，clean the desks；you，boys，sweep the floor.

　　8．Don't stay outside at night，will you?

　　9．Do put your heart into your studies before the coming exam.

　　表示命令、请求、建议、劝告或号召的句子叫祈使句。祈使句的主语一般为you，通常省略，谓语动词使用原形，句末用感叹号或句号。

　　Be quiet，please.

　　请安静。(请求)

　　Go and wash your hands.

　　去洗手。(命令)

　　Watch your steps.

　　走路小心。(劝告)

　　Look out！Danger!

　　小心！危险！(警告)

　　Keep off the grass.

　　勿踏草坪。(禁止)

1．祈使句的肯定式