Which answer choice contains the past participle of the verb "talk"
1.Talk***
2. Talking
3. had talked
4. was talking
Nope.
The past participle of the verb "talk" is "talked." In this case, the answer choice that contains the past participle is 3. "had talked." To determine this, you need to understand how past participles are formed. In regular verbs, the past participle is formed by adding "ed" to the base form of the verb. In this case, "talk" is a regular verb, so the past participle would be "talked." Answer choice 1, "Talk," is in the base form of the verb, and answer choice 2, "Talking," is the present participle form. Answer choices 4, "was talking," is in the past continuous form and not the past participle form. Therefore, the correct answer is 3. "had talked."
/guidetogrammar.org/grammar/verbs.htm#tense
Go down to Four Verb Forms and read the chart.