it is +adj of sb to sth 與 It is +adj for sb to do sth 的區(qū)別
it is +adj of sb to sth
此結(jié)構(gòu)中,形容詞多是【修飾sb】,表明【人所具有的品質(zhì)、特點(diǎn)】.常用的形容詞有nice,kind,fine,honest,true,good,friendly,enthusiastic,warm-hearted,/bad,cruel,cold-blooded等.例如：
It's kind of you to say so.
可以轉(zhuǎn)換為：You are kind to say so.
It's nice of you to help me.
It is +adj for sb to do sth
這個(gè)結(jié)構(gòu)中,形容詞多是【修飾sth】,表示【不定式短語內(nèi)容所體現(xiàn)出的特點(diǎn)】.常用形容詞有：important,unimportant,difficult,hard,easy,necessary,unnecessary ,helpful,useful等.
例如：
It's important for us to learn a foreign language .
可以轉(zhuǎn)換為To learn a foreign language is important.