Imperatives and should

Imperatives

Affirmative

Verb+complement

Negative

Don't+verb+complement

Should

Affirmative

Subject+should+verb.i+complement

Negative

Subject+shouldn't+verb.i+complement

Interrogative

Should/Shouldn't+subject+verb.i+complement

We use imperatives to give orders and advice, and to make suggestions and invitations

We use should to give or ask for advice.