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