Question

祈使句是用来表示命令,请求或建议的句子.祈使句的主语you通常省略.

Answer 1

please,can,must,let's,don't,may

1.Don't open the window.

2.Please sit on the desk.

3.要求是什么?

4.Tommy can swim very fast.

5.No,you needn't.