是hard to do sth 还是 hard doing sth

是hard to do sth 还是 hard doing sth hard to do sth.还是 hard doing sth.Could you please do sth. hard to do sth it is hard to+Ving还是to do sth 是hard for sb donging sth还是hard for sb to do sth我和同学打赌的啊,我打to do的 hard to do sth对吗 must 后面是加to do sth.还是do sth. 是should to do sth 还是 should do sth? 是can to do sth.还是can do sth. it 后面动词是do sth.还是to do sth. 是take action do sth还是to do sth? 是want to do sth and do sth还是want to do sth and to do sth? ( )to do sth是副词还是形容词 是take sth.to do sth.还是take sth.to doing sth. 是mind to do sth还是mind doing sth? worry about 是doing sth还是to do sth 到底是learn to do sth还是learn doing sth 是 stand doing sth.还是stand to do sth