1 A: We found a $20 note in the school canteen.
Should we keep it?
B: No, you shouldn't keep it.
You should give it to one of the teachers.
2 A: They really love their Alsatian dog.
B: I know , but they should feed him the best steak all the time!
3 A: I'm going to the beach
B:You should put some sunscream on.