How to use ought to? What is Ought to? All the usages of ought to. MODAL.

Ought to is followed by 'to'. Sometimes it is used without 'to'.

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It doesn't change its form.
A) You can use it to say about what is the right thing to do.
For example:
1. They thief ought to be punished.
2. They ought to have apologised.
3. Smoking ought not to be allowed in the office.
4. She oughtn't to have been eating all medicines.

B) You can use it to say what you expect or would like to happen.
For example:
1. Children ought to be able to walk by the age of 1.
2. Editors ought to earn more.

C) You can use it to say what you advise or recommend.
For example:
1. You ought to be leaving now.
2. The meals are sumptuous. You ought to try some.
3. You ought to have come to tour. It was interesting.

D) You can use it to say about what has probably happened or is probably true.
For example:
1. If she started out at seven, she ought to be here by now.
2. That ought to be enough fuel for our journey.
3. Oughtn't the chicken to have cooked by now?
Kindly share it if you feel it deserves.
Regards
Nasser Gorsi