it is hard to+Ving还是to do sth

it is hard to+Ving还是to do sth It is hard to 是i find it hard to say 还是i find it is hard to say It is +adj+-ving和It is +adj+to do sth可以互换吗? It is hard to wait It is hard to please It is hard to select! It is +adj+-ving的语法现象? 英语语法：love+Ving 还是 +to do? 请用there is no way of Ving 造句There is no Ving = There is no way of Ving.= There is no possibility of Ving.= It is impossible to V.= It is out of the question to V.= No one can V.= We cannot V.能分别造个句吗? 戒烟很困难it is tough to quit smoking还是it is difficult to quit smoking,还是it is hard to quit smoking It is hard to study English g______well. it is time to study hard! why it is so hard to do It is hard to bear with criticism. it is hard to say 什么意思? It is hard to be a soldier. 倒装though f it is hard to control onesel,i wish i could forget应该是hard to control oneself though it is ,i wish i could forget还是hard though it is to control oneself ,i wish i could forget