it is hard to+Ving还是to do sth
it is hard to+Ving还是to do sth
用it is hard for sb to do sth造句
用it is hard work to do sth.造句 急需
it is probably hard for sb to do sth
是hard to do sth 还是 hard doing sth
it is good not to do sth 还是 it is good to not do sth?
it is too +adj to do sth 还是it is too +adv to do sth
是it is time to do sth还是 it is the time to do sth
it is difficult to do sth对还是it difficult to do sth对
It is fun to do sth对,还是It is fun to doing sth
it is difficult for sb to 和 make sb hard to do sth 有什么区别?
it is hard() sth.a.to do b.do c.doing