it is adj to do sth和it is adj doing sth

哎，不知道为什么上面的人都说it`s a. doing是错的，明明是对的嘛It is + no use, no good (fun, a great pleasure, a waste of time, a bore...)等名词+doing sth. It is no use crying.哭没有用。It is no good objecting.反对也没有用。 It is a great fun playing football．打篮球很有趣。 It is a waste of time trying to explain．设法解释是浪费时间。 It is + useless (nice, good，interesting, expensive等形容词)+ doing sth． It is useless speaking.光说没用。 It is nice seeing you again．真高兴又遇到了你。 It is good playing chess after supper．晚饭后弈棋挺好。 It is expensive running this car．开这种小车是浪费。

to do sth 错的只有It's +adj+(for sb)+doing sth这是基本！！！

后面一个是错误的

没区别