1） It’s easy (for me) to do that
我做这事太容易了 easy, difficult, hard, important, possible, impossible, comfortable, necessary, better; the first, the next, the last, the best, too much, too little, not enough It’s so nice to hear your voice
听到你的声音真高兴
It’s necessary for you to lock the car when you do not use it
当你不用车的时候，锁车是有必要的
2) It’s very kind of you to help us
他帮助我们，他真好
Kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考虑周到的), silly, selfish(自私的) 例句: It was silly of us to believe him
我们真愚蠢，竟然相信了他
It se emed selfish of him not to give them anything
他不给他们任何东西，这显得太自私了
注意：1) 其他系动词如，look，appear 等也可用于此句型 2) 不定式作为句子成分时，动词用单数形式
3) 当不定式作主语的句子中 又有一个不定式作表语时，不能用 It is… to…的句型 (对)To see is to believe
百闻不如一见
(错)It is to believe to see
