十九、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(shí)在我們的一生中扮演一個(gè)重要的角色。
二十、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。
二十一、For the past+時(shí)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(zhǔn)備考試。
二十二、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。
二十三、It pays to+V-(……是值得的。)
例句：It pays to help others.
幫助別人是值得的。
二十四、be based on(以……為基礎(chǔ))
例句：The progress of thee society is based on harmony.
社會(huì)的進(jìn)步是以和諧為基礎(chǔ)的。
二十五、Spare no effort to+V(不遺余力的)
We should spare no effort to beautify our environment.
我們應(yīng)該不遺余力的美化我們的環(huán)境。
例句：It is conceivable that knowledge plays an important role in our life.
可想而知，知識(shí)在我們的一生中扮演一個(gè)重要的角色。
二十、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。
二十一、For the past+時(shí)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(zhǔn)備考試。
二十二、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。
二十三、It pays to+V-(……是值得的。)
例句：It pays to help others.
幫助別人是值得的。
二十四、be based on(以……為基礎(chǔ))
例句：The progress of thee society is based on harmony.
社會(huì)的進(jìn)步是以和諧為基礎(chǔ)的。
二十五、Spare no effort to+V(不遺余力的)
We should spare no effort to beautify our environment.
我們應(yīng)該不遺余力的美化我們的環(huán)境。