为什么要说I find it hard to do而不说I find it's hard to do

为什么要说I find it hard to do而不说I find it's hard to do I find it hard to do you good? I find it hard to do that.I find it no good doing that. find it hard to do 同义词 I find it hard to control I find it hard to trust 急 Every night I find it's so hard to sleep I find it hard to imagine与It's hard to imagine区别,为什么一个没有is,一 是i find it hard to say 还是i find it is hard to say think it hard to do 和 i think it's hard to do 有什么区别 What subjects do you find it hard to listen to?it 和hard之间为何不 it's hard to find that kind