Question

I found that it was diffcult to learn maths well（改为同义句） I三个空填什么to learn maths well

Answer 1

I found that it was diffcult to learn maths well（改为同义句） I found it difficult to learn maths well
形式主语
有不会的可以再问我

Answer 2

found it difficult

有不会的再问，如果对你有所帮助，请记得及时采纳哦

Answer 3

I found it diffcult to learn maths well

Answer 4

我发现想把数学学好不容易。i found it difficult to learn maths well.