In English there are lots of modal verbs（情态动词） and they allow us to express things like possibility, obligation, and ability. Our students in class tried to remember the modal verbs that they had studied in the past and the different functions of modal verbs:

You should eat your vegetables (advice)

I may come to the cinema tonight (possibility)

Could you help me do this? (request)

Choose the correct modal from the two choices from an article in a magazine about regrets

Regrets

As we get older and when we think about our past we sometimes ponder the things that we should/can have done. And we also may/shall regret those things we did badly and the mistakes we made. In reality, we be able to/can always learn from our mistakes and hope to never make them again. For example, if I failed a test because of a lack of study, the next test I will/must hope to pass because of hard work. Remember too that some regrets are not based in reality and we must/may waste time thinking that they are. Would/should I have really not have been involved in a car crash if I had been driving more slowly? After all, the other driver ought to/will have been concentrating and not playing with their radio. We have to/would be honest with ourselves and live in the now. The only things we used to/can control are the things happening now, in this moment.

回答

Regrets

As we get older and when we think about our past we sometimes ponder the things that we should have done. And we also may regret those things we did badly and the mistakes we made. In reality, we can always learn from our mistakes and hope to never make them again. For example, if I failed a test because of a lack of study, the next test I will hope to pass because of hard work. Remember too that some regrets are not based in reality and we may waste time thinking that they are. Would I have really not have been involved in a car crash if I had been driving more slowly? After all, the other driver ought to have been concentrating and not playing with their radio. We have to be honest with ourselves and live in the now. The only things we can control are the things happening now, in this moment.