- when, while与as的用法区别
- because, since, as与for用法辨析
- pleasant,pleasing,pleased的用法区别
- travel,trip,journey的用法区别
- continue与go on用法区别
- fit，match，suit的区别
- keen on doing sth 与keen to do sth 的区别
- until 后接过去分词
- 介词below与under的用法区别
- 介词across, along, through的区别
- according to的用法
- get to do与get doing的三大区别
- ago 与 before的用法区别
- because, since, as, for的用法区别
- onto 与 on to 的用法区别