What is a gerund, and how does it function in a sentence?
1:A gerund is a verb ending in -ing that functions as a verb in a sentence.
2:A gerund is a noun that functions as the direct object receiving the action in a sentence.
3:A gerund is a noun that functions as the subject of a sentence.
4:A gerund is a verb ending in -ing that functions as a noun in a sentence.