He__(finish)his math exercises before he went out to play.

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He__(finish)hismathexercisesbeforehewentouttoplay.He__(finish)hismathexercisesbeforehewentouttoplay.

He__(finish)his math exercises before he went out to play.
He__(finish)his math exercises before he went out to play.

He__(finish)his math exercises before he went out to play.
had finished
过去完成时

had finished