Would Rather/ Had Better

You look sick. You‘d better see a doctor.

São seguidos do infinitivo do verbo principal sem a preposição to.

He would rather stay here.
He had better take an aspirin.

1. Would rather(‘d rather) expressa preferência no presente. Tem o mesmo sentido do verbo prefer.

She would rather take a taxi.
She prefers to take a taxi.

I‘d rather go now.

NOTE: would rather = would prefer to

2. Had better(‘d better) expressa conselho, recomendação.

You look sick. You‘d better see a doctor.
She‘d better go home.

Formas interrogativas e negativa:

Would rather

Interrogative form: Would she rather take a taxi?

Negative form: She would rather not take a taxi.

Had better

Interrogative form: Had you better eat this apple?

Negative form: You‘d better not eat this apple.

Para indicar preferência entre duas alternativas, ambas expressas, usa-se than:

She would rather take a taxi than a bus. Ela prefere tomar um táxi a tomar um ônibus.