Pointers
1. Gerunds are commonly used after an adjective + a preposition:
He is good at carving statues out of wood.
2. A gerund may follow a possessive adjective or the possessive form of a noun:
She was annoyed at your interrupting her.
However, the pronoun or the noun can be used instead, especially in speech:
She was annoyed at you interrupting her.
3. A gerund may also be used after a verb + a preposition:
They insisted on accompanying us to the bus station.
Use the possessive form of the pronoun and the gerund of the verb given.
Do you enjoy _____ (they, sing)?
Do you enjoy their singing?