Some of these sentences aren't right.correct them. 9)stay here until i return from the bank. 10)before summer will come,we won't leave the city for the sea. 11)don't go out if it rains. 12)when autumn will begin,the leaves will start falling from the trees.

9) Stay here until I return from the bank.
10) Before summer comes, we won't leave the city for the sea.
11) Don't go out if it rains.
12) When autumn begins, the leaves will start falling from the trees.