i find it hard to keep a dog hard 是形容词,为什么前面没有be?不是 it is adj to do

I find it hard to control 是i find it hard to say 还是i find it is hard to say I find it hard to trust 急I find it hard to trust? I find it hard to solve the problem.翻译 I find it hard to do you good? 为什么要说I find it hard to do而不说I find it's hard to do ,I found it hard to find time to exercise.翻译下特别是 hard to I find it hard to imagine与It's hard to imagine区别,为什么一个没有is,一个有is. I find it hard （to learn） Chinese well 为什么是to leaI find it hard （to learn） Chinese well为什么是to learn I find it hard to get along with her.形式宾语能不能改成I find it‘s hard to get along with her.为什么 find it hard to do 同义词 it's hard to find that kind I find it very hard to speak.请问very hard 和to speak在句中是什么成份? I find it hard to do that.I find it no good doing that.这两句的宾语分别是什么?hard no good 是什么成分? I find that it's hard to get on with Mike.(同义句)I find ( )( )( )( )on with Mike. i worked so hard to find you . I find it hard to explain it to him(同义句转换） I find （ ）（ ）（ ）（ ）it to him. I find it's hard是不是=I find it hard