it is 形容词 doing sth 和to do sth有什么明显区别 麻烦说详细点奥

it is 形容词 doing sth 和to do sth有什么明显区别 麻烦说详细点奥 可以说It is easy doing sth吗 it is difficult doing.sth造句 用it is pleasure doing sth造句 It is worth doing sth同义句 It is+形容词后面可不可以加doing it +形容词+to do sth 和it is +形容词+to do sth 有什么区别? it is adj.to do sth.it is adj.doing sth.有什么区别it is adj.to do sth.it is adj.doing sth.有什么区别? it is no it is no use doing sth为什么不是it is not use doing sth? It is for sb to do sth 与It is doing sth的区别 It is fun to do sth对,还是It is fun to doing sth It is no use doing sth与It is no use to do sth的区别. it is my frist time to do sth / or doing sth/or do sth? it is+形容词+for sb it is+形容词+to do sth造句 it is no good doing sth和it is no use doing 要例句 no use是什么词性?是名词.形容词还是什么.如果说是名词的话，我能不能说it is happiness doing sth 用it is no pleasure doing sth 造句? It is comfortable doing sth.有这个句型吗?