The basic form of a verb
We use to + infinitive:
- after adjectives (e.g happy, pleased, easy, difficult, safe, possible)
*) I'm happy to meet you.
*) It's nice of you to say that.
*) It's important for you to practice your English knowledge every day.
- to express purpose (=what a person want to archive)
*) I am going to call him soon.
*) I came here to meet a client.
*) I called you to ask about this important matter.
- to make a comment or judgment
*) It was a very dangerous thing to do.
*) She is the best partner to work with.
*) That was not a nice thing to say, Bro.
- with adverbs
*) There isn't enough time to study!
*) The ice cream is too cold to eat.
*) That was not a nice thing to say, Bro.
- with question words
*) Do you know how to operate this machine?
*) My room is full already. I don't where to put all this stuff.