Change the following sentences according to the example. Example: If he came to see us, we would have a good time. — Should he come to see us, we would have a good time. If he had come to see us yesterday, we would have had a good time. — Had he come to see us yesterday, we would have had a good time, 1, If I had known who was invited, I would have never come, 2. You would hardly recognize her if you met her. 3, If a passer-by hadn't helped us, we would not have found the way. 4. Mother would have had a short rest if the sick boy had gone to sleep. 5. We wouldn't have made friends with them if we hadn't stayed at the same hotel. 6. It wouldn't have been so cold in the morning if the wind had stopped blowing. 7. Peter would accept your invitation if he were in London. 8. They wouldn't have quarreled if they both bad not been so nervous. 9. If they didn't like each other, they wouldn't spend so much time together. 10. If it snowed, the weather would get warmer.