She didn1t have to defend her point of view.

Apuntes

• Subtopic: Expressing Certainty and Uncertainty in the Past She didn't have to defend her point of view. She can’t be bothered to express certainty in the talk because her delivery was perfect. She must have a past participle in negative. She can’t have fought harder to defend her point of view. He can’t have lost his wallet — I saw him holding it at the supermarket checkout. We might go on holiday after all if we save enough money in time. We'd better leave now because the traffic could be very heavy in the afternoon. **May, might, and can’t (or mightn’t) in negative sentences** **May, might have, could have, might have been, must have + past participle to express possibility about the past:** His case, I think he may have picked up the wrong train or might have noticed. It's astonishing she isn't here yet. She's usually so punctual. I think she might not have noticed.