Comparativo: Need x Had better
Need uso para falar sobre necessidade.
Had better seria algo no português como: Seria bom queÉ MUITO UTILIZADO PARA ACONSELHAR
Significa que, caso voce não faça aquilo, poderá acontecer algo ruim.
- You had better dry your hair before going out. If you don’t you will catch a cold.
- You have had a bad headache for two weeks? You had better see a doctor.
- You had better do all of your homework, otherwise you will not pass the course.
Preste atenção: não se usa TO após Had better.