Section_ⅢGrammar-_祈使句

　　语法图解

　　探究发现

　　①Don't bring your cellphone to school.

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

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

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

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

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

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

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

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

　　[我的发现]

　　(1)①②句为否定祈使句，③④句为肯定祈使句。肯定祈使句以动词原形开头，否定祈使句以don't或never开头。

　　(2)由⑤⑥句可知，let's引导的祈使句的反意疑问句用shall_we，let us引导的祈使句的反意疑问句用will_you。

　　(3)由④⑥⑧句可知祈使句的反意疑问句通常用will_you。

　　(4)⑦⑨句中，在祈使句前可加do或you对句子表示强调，以加强句子的语气。

　　一、定义

　　表示命令、请求、建议、劝告、警告或禁止的句子叫祈使句。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)