This is grammatical:
I'm too tired to drive.
but this isn't:
I'm tired to drive.
Why? How can removing an adverb make a sentence ungrammatical?
In a sentence like “He slowly walked down the street”, you can remove the adverb and still get a grammatical sentence: “He walked down the street.” What is different about “I'm too tired to drive”?
I have also often come across such constructions as:
I am tired to do that
I am tired to please them
I am tired to lose the championship at the last race; it has happened too many times in the last years
Are these ungrammatical?