English grammar rule Allow to
I enjoy to run.
A gerund is a word formed from a verb plus -ing, and always acts as a noun. Gerund or gerund phrases after a verb serve as the object of the verb, a subject complement, or the subject of an inverted sentence. There are certain verbs that are usually followed by a gerund, but no easy way to remember which ones they are.
Incorrect Jimmy can imagine to be happy. Correct Jimmy can imagine being happy. Incorrect Sophie risks to lose a lot of money. Correct Sophie risks losing a lot of money.