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

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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
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

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

My son asked the teacher if the earth goes around the sun.

My son asked the teacher if the earth goes round the sun.