In which of the following sentences is the underlined word a past participle ? (a) we (helped)Joan to pack her things (b) I was (working)overtime for about six months (c)Jenna has (driven)this route multiple times.(d)She would (like) to join us

To identify the sentence in which the underlined word is a past participle, we need to understand what a past participle is. A past participle is a verb form that typically ends in -ed or -en and is used to form various verb tenses, such as the present perfect and past perfect.

Let's examine each sentence and identify the underlined word in each one:

(a) "We helped Joan to pack her things."
In this sentence, the underlined word is "helped." Although it ends in -ed, "helped" is a past tense verb form, not a past participle.

(b) "I was working overtime for about six months."
In this sentence, the underlined word is "working." It ends in -ing, which indicates that it is a present participle, not a past participle.

(c) "Jenna has driven this route multiple times."
In this sentence, the underlined word is "driven." It ends in -en, which is a common indicator of a past participle. Therefore, this sentence contains a past participle.

(d) "She would like to join us."
In this sentence, the underlined word is "like." It does not end in -ed or -en, so it is not a past participle.

The sentence in which the underlined word is a past participle is (c) "Jenna has driven this route multiple times."