ব্যাখ্যা
Identifying gerunds is a frequently tested grammar topic in BCS examinations.
Definition of Gerund:
A gerund is a verb form ending in "-ing" that functions as a noun in a sentence.
Analysis of the sentence:
"They talked about going on a vacation"
— "about" is a preposition
— After a preposition, we use a verb in its "-ing" form
— "going" here acts as the object of the preposition "about"
— Since it functions as a noun (object), it is a GERUND
Key Rule:
Preposition + Verb-ing → Gerund
Distinguishing from other forms:
✗ Participle: Modifies a noun/pronoun (e.g., "The going train")
✗ Infinitive: "to + verb" form (e.g., "to go")
✗ Verbal noun: Usually takes an article or possessive (e.g., "The going of the train was delayed")
More examples of Gerunds after prepositions:
— "She is good at singing"
— "He is interested in learning"
— "Thank you for coming"
Source: A Practical English Grammar — A.J. Thomson & A.V. Martinet; English Grammar in Use — Raymond Murphy.