The sentence that includes a gerund is: "Swimming in the gulf is Finn's favorite summer activity."
In this sentence, "Swimming" functions as a noun and is the subject of the sentence, which makes it a gerund.
While swimming at the beach, Harper found a starfish.
Swimming in the gulf is Finn's favorite summer activity.
Swimming in the gulf is Finn's favorite summer activity.
Graham learned to dive at the community swimming pool.
Graham learned to dive at the community swimming pool.
Nash has been swimming since he was five years old.
1 answer
The sentence that includes a gerund is: "Swimming in the gulf is Finn's favorite summer activity."
In this sentence, "Swimming" functions as a noun and is the subject of the sentence, which makes it a gerund.