it is adj to do 和it is adj do一样吗?有没有it is adj do?好像是两个句型的结构上不同把?解释一下啊!

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it is adj to do 和it is adj do一样吗?有没有it is adj do?好像是两个句型的结构上不同把?解释一下啊!

没有it is adj do.
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

这个句型是这样的 :
it is adj to do
例如:
it is fine to have a good sleep at weekends.