The Infinitive with to
after:
the first
Gagarin was the first to fly in a spaceship.
the last
Peter was the last to watch the film.
the next
He is the next to get his passport.
after:
adjectives
I'm happy to be here.
It's better not to smoke.
after:
certain verbs (agree, choose, forget, hope, learn, promise, regret, want, …)
I learn to drive a car.
after:
question words
I don't know what to say.
Can you tell me how to get to the bus stop?
after:
want/would like
I want you to help me.
verb + object + to-infinitive
I helped my dad to clean the car.