1、It is conceivable that+句子(可想而知的);It is obvious that+句子(明顯的);It is apparent that+句子(顯然的)

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

　　可想而知，知識在我們的一生中扮演一個重要的角色。

　　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.

　　夏天很燠熱。那就是我不喜歡它的原因。

　　3、For the past+時間，S+現(xiàn)在完成式……(過去……年來，……一直……)

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

　　過去兩年來，我一直忙著準備考試。

　　4、Since+S+過去式，S+現(xiàn)在完成式。

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

　　自從他上高中，他一直很用功。

　　5、It pays to+V-(……是值得的。)

　　例句：It pays to help others.