我不知道他是不是对数学感兴趣的翻译：I don't know if he was interested in mathematics 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I do not know that he is not interested in mathematics

I don't know if he was interested in mathematics

I did not know he is interested to mathematics

I do not know whether he was interested in mathematics

I don't know if he was interested in mathematics