- What does he like? (verb) - He likes football.
- What is he like? (preposition) - He is friendly.
- What does he look like? (preposition) - He is handsome.
Students will often try to use "like" (prep) in their answers to these questions, e.g. *"He is like friendly".
Students can use like as a preposition without knowing (1) that it is a preposition or (2) even what a preposition is, however they really ought to know what a verb is!