【新思路】2018-2019学年人教版高中英语必修3课件:Unit 2 Healthy eating 5-Grammar
【新思路】2018-2019学年人教版高中英语必修3课件:Unit 2 Healthy eating 5-Grammar第5页

a. should, ought to 都可表示“应该”。ought to 用于表示按道理应当,常指客观的义务或责任,大多数情况下可用should 代替,但比 should 语气重。

I should help her because she is in trouble. You ought to take care of the baby.

Modal verbs