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 regret the to-infinitive is used when announcing bad news:
We regret to inform you that the flight to Munich has been cancelled.

In other cases the Gerund is used.

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.

NOTE!!!

I want to help you.

I want you to help me.