Chen Xiang wondered where I have been 和 Li Lei said that the moon went round the earth 怎么改
问题描述：
Chen Xiang wondered where I have been 和 Li Lei said that the moon went round the earth 怎么改
答
Li Lei said that the moon goes round the earth
Chen Xiang wondered where I had been(这个不太清楚）
答
have变成had，went变成goes。 一般情况下过去式的从句往后推一个时态，但是定理必须用一般现在时，不受从句影响
答
Chen Xiang wondered where I had been.过去的过去用过去完成时
Li Lei said that the moon goes around the earth.普遍真理用一般现在时