英文祈使句

Go and wash your hands.
（去洗你的手。——命令）
Be quiet, please.（Please be quiet.）
（请安静。——请求）
Be kind to our sister.
（对姊妹要和善。——劝告）
Watch your steps.
（走路小心。——警告）
Look out！Danger！
（小心！危险！——强烈警告，已如感叹句）
Keep off the grass.
（勿践草坪。——禁止）
No parking.
（禁止停车。——禁止）
Let me try.
Let's do it.
Let me go and look for it.
a. Don't disturb him.
Let's not disturb him.
Let Robert take charge of the marketing department.
Let her join our choir
Let the puppy out.
Open the windows and let the fresh air in.
The room is too sunny. Let the blinds down.
Let me alone, please.

Let's try it, shall we?
Let us do it by ourselves, will you?

你把动词提前了
或者是助动词提前了就差不多是祈使句了

祈使句是什么？
搭车学习。。。

Go and find a job,Please !