As soon as...
This expression indicates that something happens immediately after an action is performed; it is often used in literary contexts.
Examples
仕事が終わるそばから、友達から遊びに誘われた。
As soon as I finished work, I was invited to hang out by a friend.
宿題をやるそばから、次の課題が出される。
As soon as I finish one assignment, another one is given.
映画を見終わったそばから、感想を求められた。
As soon as the movie ended, I was asked for my impressions.
Quick check
宿題をや___そばから、次の課題が出される。