(1) It is the responsibility of to do sth.
【分析】注意,从形式上看该句子很像强调句型,而实际上并非如此,因为句中it是形式主语,动词不定式作实际主语。
It is the responsibility of every citizen in our society to do his utmost to protect the environment.
(2) It is the , I suppose, that have\has given rise to .
【分析】该强调句型强调句子主语,I suppose作为插入语。这是一个很好掌握的四级长句,在作文中需要分析原因时,可以用它阐述自己的看法。
It is the tighter job market, I suppose, that has given rise to the increase in the number of unemployed college students in China.
(3) It is only when that .
【分析】强调句型强调when引导时间从句。
It is only when you nearly lose someone that you become fully conscious of how much you value him.