Imperativo
1° persona del plural
Afirmativo: Let us (= let's) + infinitivo (sin "to")
- Let us start the meeting
Negativo: Let us not + infinitivo (sin "to")
- Let us not delay our decision
2° persona singular / plural
Afirmativo: Infinitivo (sin "to")
- Open the door!
Negativo: Don't + infinitivo (sin "to")
- Don't smoke here!
3° persona singular / plural
Afirmativo: He / she / they + must + infinitivo (sin "to")
- He must finish her homework
Negativo: He / she / they + must not + infinitivo (sin "to")
- She must not pay that bill