Some of these sentences aren39;t right.Correct them 1. I39;d like to

Some of these sentences aren39;t right.Correct them 1. I39;d like to know if you39;ll come to the party. 2. After they39;ll buy the food,they39;ll begin cooking.3. Write to me if you come Moscow next summer.4. Stay here until l return from the bank.5. Before summer will come,we won39;t leave the city for the sea 6. Don39;t go out if it rains.7. When autumn will begin,the leaves will start falling from the trees pleease