1. It is + adjective/ noun + clause

　　注意： 先翻从句部分， 再翻形容词/名词部分。

　　a. So it is quite sad when divorces come with small provocations, when parents and children give up on one another, when friendships falter at the first injury, for thus we forfeit a great work of art——the long love。

　　b. It is thus no exaggeration that Americans have taken to mechanical cooling avidly and greedily。

　　c. As a result of such contradictory evidence, it is uncertain whether those suffering seriously as a result of labor market problems number in the hundreds of thousands or the tens of millions。

　　2. It is + adjective + infinitive to

　　注意： 先翻不定式部分， 再翻形容词部分。

　　a. It is extremely wasteful to give years of training at public expense only to have the qualified teacher or nurse marry after a year of two and be lost forever to her profession。

　　b. It is essential for modern men to master one or two foreign languages。

　　c. It is difficult for us to over-praise the book。

　　3. It is + past participle + that-clause

　　注意： 先翻过去分词部分， 再翻从句部分。

　　a. It is reported that Sadam Hussein was betrayed by his janissary。

　　b. It is said that

　　c. It is believed that

　　d. It is rumored that

　　e. It is estimated that

　　f. It is known that

　　g. It is argued that

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