Question

In which of these statement does "Must" expres obligation?

a- There's somebody coming in. It must be my mom.

b- You mustn't smoke here. Go outside.

c- He must be a very good student. He always gets A's.

d- I must go right now. I have class in ten minutes.

e- Who must he be? There are lots of people around him.

Answer 1

Resposta:

Letra B

Explicação:

Pois é a única alternativa que representa uma obrigatoriedade

Answer 2

Resposta:

a- There's somebody coming in. It must be my mom.

b- You mustn't smoke here. Go outside.

c- He must be a very good student. He always gets A's.  

d- I must go right now. I have class in ten minutes.

e- Who must he be? There are lots of people around him.

Explicação:

a- There's somebody coming in. It must be my mom. = Tem alguém entrando. Deve ser minha mãe.

b- You mustn't smoke here. Go outside. = Você não deve fumar aqui. Vá para fora.

c- He must be a very good student. He always gets A's. = Ele deve ser um aluno bom. Ele sempre tira A.

d- I must go right now. I have class in ten minutes. = Eu devo/tenho que  ir agora. Eu tenho aula em 10 minutos.

e- Who must he be? There are lots of people around him. = Quem deve ser? Tem muitas pessoas ao redor dele.