什么时候是I found it 什么时候是I found that

什么时候是I found it 什么时候是I found that I found it difficult that I learn English 句中的difficult是宾语补足语 I found it astonishing that he __________ have i found you是 为什么是It seemed that 不是It is seemed that?为什么it作形式宾语只能说I found It was __ that i found my books.是选in the place that i had le I found that it was difficult to do the math probiem.I found I found it very diffcult to get a job.同义句转换：I found that ___ 比如:I found it interesting I found that it was easy to heip others. I just found that it is a.or ad.only. I found that it was frustrating to learn English grammar.