1 . 单句改错。下列各句中均有一处错误，找出并改正。
1. Not until I began to work didn’t I realize how much time I had wasted.
2. Only by practicing a few hours every day you will be able to master the language.
3. No sooner had I got to the station then the train left.
4. Were he to leave today, he will get there by Sunday.
5. So frightening was he in the darkness that he didn’t dare to move an inch.
6. I wonder if your wife will go to the ball. If your wife do, so will mine.
7. Only after I read the text over again I know its main idea.
8. Not until he arrived at home did he find that this wallet had been stolen.
9. Was I you, I would accept the invitation and go to the party.
10. Not only did he made a promise, but he also kept it.