Use of had better

Sub.  + had better + bare infinitive + obj. + extension.

You had better go home now.

He had better start the work.

You had better finish your duty.

You had better take off your wet shoes.

had better is used with any kind of person that means 1^st, person, 2^nd person and 3^rd person singular and plural numbers.

We had better go home now.

They had better start their journey.

He had better wait a little bit.

You had better stay now.

Negative sentence

Sub + had better not+ v (simple present form) + ob + extension.

You had better not do it again.

She had better not wait for me anymore.

We had better not waste our time.

The man had better not go back.