- while的用法
- surprise的用法
- all, every, each的用法区别
- afford的用法
- however与but 的用法区别
- feeling可数吗?
- exercise的用法
- 名词胡须beard可数吗
- when, while, as的用法区别
- although与though的用法区别
- thank和thanks的用法区别
- few, little, a few, a little 的区别
- try doing/to do的区别
- no more…than与not more…than区别
- in,put on,wear,dress,have on,pull on辨析