10.6.7 Ejercicio 7 - Repetición: Verbos modales y negación

Más explicaciones las encontrará en el Capítulo 6.

Transforme estas frases afirmativas en frases negativas
He could have been a doctor.
They always have wanted to live by the sea.
She swims all day.
The girl got the train.
You have been waiting for him for hours.
They have lived in a castle since 1798.
He worked yesterday.
They are closing the bar, we should ask them to open again.
She had been having her exams right before, she went to France.
We have been waiting for you here since ten, now it's twelve.

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