it is a.to do sth 有没有含义没有含义,其功能是什么

It is a pleasure to do sth. 有没这个句型:think it adj to do 或 find that it is adj to do sth it is a great fun to do sth.还是it is great fun to do sth 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 +形容词+to do sth 和it is +形容词+to do sth 有什么区别? it is a waste to do sth与it is wasteful to do sth有区别吗?他们的用法?RT it is time to do sth 和it is time for sth有区别么 It is time to do sth和It is time for sth有区别吗? It is a good way to do sth.造句 It is worthy to do sth有这种用法对吗? it is a.to do sth 有没有含义没有含义,其功能是什么 It is+形容词+for sb to do sth与It is+形容词+of sb to do sth有什么区别? It is great fun to do ...It is great fun to do sth还是It is a great fun to do sth? It is +adj +to do 有这个句型么?It is +adj+for sb to do sth 与 2.It is+adj+of sb to do sth, It is fun to do sth造句 It is fun to do sth.造句. It is times to do sth造句 it is enough to do sth