Question

Must has no past tense. Which verb form do we use to express the same idea in the past ?
A) Should
B) had to

Answer 1

Resposta:

B) Had to

Explicação:

Como must não tem forma passada, a forma had to deve ser empregada para expressar a ideia de obrigação no passado:

Yesterday I had to stay up working until one o'clock in the morning. (Ontem tive que ficar trabalhando até a uma da manhã.)