1、It is conceivable that+句子(可想而知的);It is obvious that+句子(明显的);It is apparent that+句子(显然的)

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

　　可想而知，知识在我们的一生中扮演一个重要的角色。

　　2、That is the reason why-(那就是……的原因)

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

　　夏天很燠热。那就是我不喜欢它的原因。

　　3、For the past+时间，S+现在完成式……(过去……年来，……一直……)

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

　　过去两年来，我一直忙着准备考试。

　　4、Since+S+过去式，S+现在完成式。

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

　　自从他上高中，他一直很用功。

　　5、It pays to+V-(……是值得的。)

　　例句：It pays to help others.