I found it difficult to work out the problem.中it可以换成it's吗?为什么?急

I found it difficult to remember everything.改为复合句 翻译I found it very difficult to win the game. I found it difficult to fall a_ last night i found it difficult __________( fall )asleep last night I found it difficult.等不等于 i found it is/was difficult?kankanI found it difficult to solve the problem.等不等于 i found it is/was difficult to solve the problem? The next question_was put to meby Mary.A.i found difficult an answerB.i found it difficult to answer C.that i found it difficult to answerD.i found difficult to answer it I found dealing with the problem difficult.同义句 I found it 填空 填空 the problem. I found it very difficult to learn maths well.我觉得应该是 I found that it is very difficult to learn maths well. i found (it)difficult to work together with her. 为什么添it I found it difficult to get to sleep inI found it difficult to get to sleep in the night同义句 I found it is very difficult to understand what the foreigner said.（×）为什么不能是“found it is very difficult to...”,不是find可接从句吗? I found it very difficult to get a job.变同意句.I found that ______ ______ very difficult to get a job. I found it difficult to learn English well 同义句 __was difficult___ ____to learn English well i found it difficult to learn english well哪个是宾语 I found it difficult to get to sleep.主语是 to get to sleep? I found it most difficult to get to sleep.to get to sleep做什么句子成分? I found it difficult to get to sleep 句中,主谓宾各是什么? i found that it was difficult to do the math problem改简单句