parents found it is difficult/it difficult/it was difficult to teach children.说明选择原因
问题描述：
parents found it is difficult/it difficult/it was difficult to teach children.说明选择原因
答
find + it + adj. +to do固定搭配
parents found it difficult to teach children.家长们发现教孩子们难。
答
楼 上 正 解 。
I found it interesting to read different answers for one question.
答
parents found it was difficult to teach children.
英语语句中前后时态要保持一致，前面用found,表示是过去时，所以后面同样用was,过去时。
答
it was difficult
整个句子是过去时态,且有结构It be +adj+to do
答
Parents found it difficult to teach children.
此处可以看成是find + obj.+ adj.（PS：后面可以跟to do,也可以加doing）
如果把它看成是一个同位语从句的话,可以这样写：
Parents found that it was difficult to teach children.
这就是一个find + that从句了
供参考!