“It is +adj.+ to do sth.”句型中,it在句中作形式主语,而真正的主语是后面的不定式形式。有时动词不定式有自己的逻辑主语,常由“for”或“of+sb.”构成。it 作形式主语时常用两种句式结构:
(1)It is +adj. +for sb. +to do sth.
形容词描述事物的特征、性质,如:easy,difficult,interesting,funny,dangerous,important,impossible,useful等
(2)It is +adj. +of sb.+to do sth.
形容词描述行为者的性格、品质,如:kind, friendly,nice,right,clever,polite,careless,cute等
例如:
It's interesting for us to play games here in the park,but I think it's impolite of us to make so much noise.
我们在公园里玩游戏很有意思,但我觉得我们这么吵闹是不礼貌的。
Let's have a try.
谢谢!
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