1. The train couldn't run because of the snow
=>The snow prvented the train from running.
2. I didn't arrive in time to see her
=>I wasn't early enough to see her.
3. I'm sorry I was rude to you yesterday
=>I apalogise for my rudeness to you yesterday.
4. He didn't hurry, so he missed the train.
=>If he had hurried, he would have caught the train/ wouldn't have missed the train.
5. Janet is the best tennis-player in the club
=>No one in the club plays tennis better than Janet.
6. I haven't seen that man here before
=>It's the first time I've seen that man.
7. The funiture was so expensive that I didn't buy it
=>The funiture was too expensive for me to buy.
8. The robbers made the bank manager hand over the maney
=>The bank manager was made to hand over the money by the robbers.
9. He learn to drive when he was eight
=>He has learnt to drive since he was eight. 
10. She had never been so happy before
=>She was unhappier than she had ever before.