Question

Fill in the blank with a suitable modal:

You ____ to have good manners.

• A. may
• B. ought
• C. should
• D. must

Answer 1

The correct option is B ought

Modal Verbs show us the attitude of the speaker to what is being said or done. The term "modal" means expressing mood and mood is a way to express the attitude of the speaker.

Option B is correct because the word "ought' unlike modal verbs, is followed by "to", but like modal verbs, it does not change form for person.

Whereas, the modal verbs in option A,C and D, are not followed by 'to'.

Therefore, option B is the most appropriate answer to complete the given sentence.