it's difficult to make myself hear in that situation.这句话中的“hear”为什么要改成“heard”?

It's difficult to choose! It's difficult to do sth 还是It's difficult doing sth It's difficult it's difficult for it's difficult to/for有什么区别?it's difficult to和it's difficult for有什么区别?没有上下文喔句型、翻译等方面说吧 It's not difficult ____(learn) to skate. 用It's difficult to do sth.造句 It's difficult to love everyone什么意思 It's difficult to d____ between the two difficult的反义词It·s（ ）to carry It's difficult to find right shoes for his f_____. new,difficult,to,it's,words,remember(连词成句) it's very difficult to understand the english hearing It's difficult to see and hear at the back. Sometimes,it”s difficult to get off有错吗 It's really difficult to _____(education) the children well. It's difficult to see from the surface是什么意思 we all know it's difficult to p _______everybody