16、世上没有什么比…更令我快乐。

　　Nothing in the world can delight me so much as…

　　例︰世上没有什么比到快餐店吃汉堡更令我快乐。

　　Nothing in the world can delight me so much as having hamburgers in fast-food restaurants.

　　17、…是必要的：It is necessary that S(should)V

　　…是首要的：It is important/essential that S(should)V

　　…是恰当的：It is proper that S(should)V

　　…是紧迫的：It is urgent that S(should)V

　　例︰咱们当坚持公共场所清洗是应当的。

　　It is proper that we(should)keep the public places clean.

　　18、每逢我听到…我就不由得感到兴奋。

　　Whenever I hear…，I cannot but feel excited.

　　每逢我做…，我就不由得感到哀痛。

　　Whenever I do…，I cannot but feel sad.

　　每逢我想到…，我就不由得感到严重。

　　Whenever I think of…，I cannot but feel nervous.

　　每逢我遭受…，我就不由得感到害怕。

　　Whenever I meet with…，I cannot but feel frightened.

　　每逢我看到…，我就不由得感到惊奇。

　　Whenever I see…，I cannot but feel surprised.

　　例︰每逢我想到我家附近那一条明澈的小溪我就不由得感到哀痛。

　　Whenever I think of the clean brook near my home，I cannot but feel sad.

　　Every time I think of the clean brook near my home，I cannot help feeling sad.

　　19、听说…

　　It is said(that)子句

　　通常认为…

　　It is thought(that)子句

　　大家都知道…

　　It is known(that)子句

　　据报道…

　　It is reported(that)子句

　　通常意料…

　　It is expected(that)子句

　　通常估计…

　　It is estimated(that)子句

　　通常信任…

　　It is believed(that)子句

　　例︰通常信任阅读添加咱们的知识、扩展咱们的胸怀。

　　It is believed(that)reading increases our knowledge broadens our mind.

　　20、…的首要理由是…

　　The main reason why…is(that)子句

　　例︰青少年违法的首要理由是社会环境日一损坏。

　　The main reason why the juveniles commit crimes is that social environment is becoming worse.