十9、It is conceivable that+句子;It is obvious that+句子;It is apparent that+句子

例句：It is conceivable that knowledge plays an important role in our life.

不言而喻，常识在大家的一生中饰演一个要紧的角色。

二10、That is the reason why-

例句：Summer is sultry. That is the reason why I don't like it.

夏季非常燠热。那就是我不喜欢它是什么原因。

二十1、For the past+时间，S+目前完成式……

例句：For the past two years，I have been busy preparing for the examination.

过去两年来，我一直忙着筹备考试。

二十2、Since+S+过去式，S+目前完成式。

例句：Since he went to senior high school，he has worked very hard.

自从他上高中，他一直非常用功。

二十3、It pays to+V-

例句：It pays to help others.

帮助其他人是值得的。

二十4、be based on

例句：The progress of thee society is based on harmony.

社会的进步是以和谐为基础的。

二十5、Spare no effort to+V

We should spare no effort to beautify our environment.

大家应该尽心竭力的美化大家的环境。