Final Answer:
The best way to revise sentence 1 using a gerund is option (a): "My sister Ellen and I were having a chat in the living room."
Step-by-step explanation:
The use of the past continuous tense in option (a) accurately conveys the ongoing nature of the chat between the narrator and Ellen in the living room. The gerund "having" in this context denotes the continuous action, emphasizing that the conversation was in progress at a specific point in the past. This choice aligns with the narrative's timeline and maintains grammatical coherence within the sentence.
Option (b) lacks the past continuous tense necessary to convey the ongoing nature of the chat, making it grammatically incorrect. Option (c) correctly uses the past continuous tense but lacks the gerund form, which is essential for expressing the ongoing action. Option (d) uses the simple past tense, suggesting a completed action rather than an ongoing one, making it less suitable for describing a conversation in progress. Therefore, option (a) is the most appropriate choice for revising sentence 1 to include a gerund and convey the intended meaning.
In crafting effective prose, choosing the correct verb tense and form is crucial to accurately convey the timeline and continuity of actions. The past continuous tense with the gerund "having" in option (a) achieves this goal, providing a clear and grammatically sound expression of the ongoing chat between the narrator and Ellen in the living room.