ought to

应当；应该英释中释used to say that someone should do something because it is the best or most sensible thing to do

1 You really ought to quit smoking..你真的应该把烟戒了。

2 The company ought to be making changes in its marketing strategy..公司应该在营销策略上作出改变了。

3 What sort of crimes ought the police to concentrate on?.警方应当集中打击哪一类罪案？

4 You were out enjoying yourself when you ought to have been studying..应该学习的时候你却在外面玩。