__________ playing the chords improved our performance.

Question

He
His
Him
He's

Answer 1

His

Answer 2

Thank you! Is there any particular rule that would help with his/him usage?

Answer 3

From Writeacher:

http://guidetogrammar.org/grammar/gerunds.htm#possessive

Because a gerund is basically a noun in the sentence, it needs a possessive in front of it. It wasn’t he who improved the performance; it was his playing the chords that did so.

Answer 4

Thank you so much!