it is significant to do sth 这么说对吗
It is worthy to do sth有这种用法对吗?
It is adj to do sth/It is adj doing sth两个语法句式都对吗?
It is worth well to do sth/doing sth对吗?是不是worthwhile啊?
为什么能说What fun it is to do sth.却不能说How fun it is to do sth.
it is so difficult for sb to do sth,difficult用so形容对吗?
I find that it is great to do sth这句型对吗?需不需要that?
How important a thing it is to keep our promise!这么说对吗?是不是应该把
it is n.to do sth.
It is the first ...to do sth.
it is worth to do sth.
It is a pleasure to do sth.
It is times to do sth造句