Gerund clauses can be manipulated in Complex Sentences to replace nouns/noun phrases. The functions these non-finite types of clauses depend on the...

Gerund clauses can be manipulated in Complex Sentences to replace nouns/noun phrases. The functions these non-finite types of clauses depend on the type of verb chosen in the main clause. Bearing this information in mind, read the sentence below:

"My idea of fun is doing research on traditional popular narratives."

The gerund form in the sentence above functions as:

Prepositional complement

Indirect object

Subject complement

Direct object

Subject