Qual das frases abaixo não é uma forma correta de usar o verbo modal "can" no passado (past) para expressar uma possibilidade?
(A) -
they could have gone to the park if they had wanted to.
(B) -
she could not have known about it, because she was out of town.
(C) -
i could not have been more surprised when i saw her.
(D) -
we could have won the game if we had played better.
(E) -
it could have been raining yesterday, but i'm not sure.
Explicação
Para expressar uma possibilidade no passado, usamos a forma "could have" + particípio do verbo principal. na alternativa (e), o verbo principal "rain" está no gerúndio (-ing), o que é incorreto para essa construção. a forma correta seria: "it could have rained yesterday, but i'm not sure."
Análise das alternativas
As demais alternativas são formas corretas de usar o verbo modal "can" no passado para expressar uma possibilidade:
- (a): "they could have gone to the park if they had wanted to."
- (b): "she could not have known about it, because she was out of town."
- (c): "i could not have been more surprised when i saw her."
- (d): "we could have won the game if we had played better."
Conclusão
É importante entender o uso correto do verbo modal "can" no passado para expressar possibilidades. a construção "could have" + particípio é essencial para formar frases gramaticalmente corretas e transmitir o significado desejado.