Some More Uses of Infinitive:-
Along with ‘too’ and ‘enough’:-
a. He is too fat to run.
b. He is fast enough to win.
c. Patient is too weak to walk.
To combine two sentences:-
a. He is vey nice. He cannot do bad works.
He is too nice to do bad works.
b. You are very short. You cannot walk the ramp.
You are too short to walk the ramp.
To remove the relative clause:-
a. He is no one who can comment on me.
He is no one to comment on me.
b. I know a person who can teach you.
I know a person to teach you.