Tema 3 · Nível B2
Dedução no presente e necessidade
must be, can't be, needn't have
Velocidade do áudio
Must be
needn't havedeve ser · não precisavadedução · necessidade
needn't havedeve ser · não precisavadedução · necessidade
1Dedução no presente
She must be tired. deve estar cansada
He can't be 50! He looks 30.
They might be at home.
2Com -ing
He must be working. deve estar trabalhando
She might be sleeping.
3Didn't need to
I didn't need to pay. It was free.
Não precisava e não fez.
4Needn't have
I needn't have cooked. They had eaten.
Não precisava, mas fez (à toa).
5Compare
| I didn't need to buy bread. | não comprei |
| I needn't have bought bread. | comprei à toa |
6Revisão: não precisa × proibido
| don't have to | não precisa |
| mustn't | é proibido |
Erros comuns de brasileiros
| She must to be tired. | → | She must be tired. |
| He mustn't be 50. (dedução) | → | He can't be 50. |
| I needn't have to pay. | → | I didn't need to pay. |
| She must is sleeping. | → | She must be sleeping. |
| You mustn't come. (não precisa) | → | You don't have to come. |
Agora × antes
| must be | dedução sobre agora |
| must have been | dedução sobre o passado |
He must be tired now. · He must have been tired yesterday.
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