Which sentence contains a gerund? During the night, the temperature plummeted twenty degrees. To navigate the winding road safely, we concentrated intensely. On the first torrid day of summer, we always enjoy swimming. The contemptible birds singing in the yard annoyed us all night.

A gerund is a word that takes the form of a verb in - ing form, but functions as a noun when used in the sentence. The sentence that contains a gerund is, "On the first torrid day of summer, we always enjoy swimming.". The gerund in this sentence is the word "swimming". This word is used as a noun specifically as the direct object.