she said to the children ,"it is well-know that the earth moves round the sun."
问题描述：
she said to the children ,"it is well-know that the earth moves round the sun."
答
宾语从句中
she said to the children 有said后面的句子是过去式
但是it is well-know that the earth moves round the sun.是客观真理，不会因为she说的而改变
所以用一般现在时
例：The teacher said （the earth moves around the sun.）
+（客观真理） 用一般现在时
答
她对孩子们说：“我们大家都知道地球是围绕太阳转的。”
答
你肯定是想改为间接引语：She told the children that it is well-known that the earth moves round the sun..