You must be on time.We always have to wear the school uniform.这两个句子是祈使句吗?

题目

You must be on time.We always have to wear the school uniform.这两个句子是祈使句吗?
祈使句否定句和肯定句的结构是什么?

答案

这两句都不是祈使句.祈使句是表示请求、命令、劝告、祝愿或建议的句子,主语一般为第二人称,但往往省略.
如Be quiet!/ Go out!也可以加do加强语气,如Do come on time!
否定形式一般在动词前加don't,如Don't be late.
另外还有以let 开头的祈使句,肯定如 Let me have a look.否定如 Let's not hurry.