Does the earth go round the sun?My son asked the teacher.(合并为宾语从句)

问题描述:

Does the earth go round the sun?My son asked the teacher.(合并为宾语从句)
My son asked the teacher ( )the earth ( ) round the sun.并说一下if的用法

if...goes
if有两种用法,
这里是解释为是否,可以和whether互换
另一种用法解释为如果,用作条件状语