Remember the imperative does not have a subject
Examples
Forget it!
Don’t be so careful.
Finish your homework.
Let's go.

Use:
The imperative is used to express an order or a request.

Structure:
Verb stem. (verb without to)
Use the imperative in the 2 person singular and plural.
For the other voices use let.

More examples:
Leave at 5 p.m. to get there on time.
Let’s go tomorrow. (use: let me, let him/her/it, let’s)
Don’t forget your laptop.
Don't answer the phone (for the negative use don’t or let me/him/her/it/us + not)