We __________ tennis in the lawn when it suddenly started to rain.
Select the most appropriate option to complete the above sentence.
Answer
(B)
Explanation
The playing was already in progress when another past event, the rain, interrupted it. An action that continued up to a moment in the past takes the past perfect continuous, had been + verb-ing: “We had been playing tennis in the lawn when it suddenly started to rain.”
- Have been playing is present perfect continuous; it ties the action to the present and clashes with the past tense “started”.
- Would have been playing and could be playing express a guess or a possibility, not an action that actually took place.
Answer: B