介绍:
Day50
1如果你不进游泳池你怎么学游泳？
How can you learn to swim without going to a pool?
2我们应该一直记得“从实践中学习”。
We should always remember:“Learn by doing ”
3我过几天还这本书。
I will return this book in a few days.
4弹好钢琴需要大量的练习。
It takes a lot of practice to play the piano well.
要点：
①without/wɪ´ðaʊt/没有，缺乏，后接doing
②in开始介词短语，表-----后，用于一般将来时
