He _____ his homework before he went out to play.
Explanation
He had finished his homework before he went out to play.کھیلنے کے لئے باہر جانے سے پہلے ہی اس نے اپنا ہوم ورک ختم کردیا تھا۔The past perfect tense (had finished) is used to indicate an action completed before another past action (he went out to play).It shows a clear sequence of events where finishing homework happened before going out.