Imperative clauses are used when people tell someone else to do something (an advice, a suggestion, a request, a command…).
The Subject in the imperative clauses is always the same (you).
- Be at the destination point at 6.30 am. (You)
- You! Follow the line immediately.
- Soldiers! Hurry up! (You)
In imperative sentences, you is the subject all the time because imperative sentences always address someone or something.
We can also use you as a subject to show emphatic anger and persuasion.