Imperatives are used for invitations, advice, commands, suggestions...
As always with the second person (you) the singular and plural forms are identical:
You can name the person being addressed at the end of the phrase:
You can also insert please at the start or end of the phrase:
The pronoun you can be used in order to to make a distinction (you, and not someone else):
But it might sound rude sometimes:
We use don't to form a negation:
We can also use do to sound more persuasive or express irritation: