ought to
fixed phr..fixed phr.. you use this to say what is the right or best thing to do. It is also used to say that something is likely to happen.
fixed phr.. a semi-modal verb used to express duty, moral obligation, or advisability; it can also indicate a strong probability or expectation based on logic.
You ought to call your mother more often.
We ought to leave now if we want to catch the last train home.
The government ought to have anticipated the economic downturn given the volatility of the global markets over the preceding months.
followed by the bare infinitive with 'to'; it is less common in questions and negatives than 'should'.
teach this as a synonym for 'should' but note that 'ought to' carries a slightly stronger sense of moral obligation or external expectation.
You ought call him.You ought to call him.unlike most modal verbs, 'ought' requires the particle 'to' before the main verb.