1 don't argue with your granny , you need TO respect her age.
2 She looks bad she OUGHT to be more careful about her health.
3 You ought TO go and see the Giant's Causeway by all means.
4 Helen SHOULD thank him for advice.
5 You OUGHTN'T to eat unhealthy food, if you want to keep fit.
6 He should not _ miss his lessons.
7 My sister SHOULDN'T read in bed.
8 You ought TO read the text carefully and then to make a project.