Ask her if she will go with us.为什么不能选if or not she will/that if she will/whether will she麻烦解释的详点.

Ask her if she will go with us.为什么不能选if or not she will/that if she will/whether will she麻烦解释的详点.
Ask her if she will go with us.为什么不能选if or not she will/that if she will/whether will she
麻烦解释的详点.

Ask her if she will go with us.为什么不能选if or not she will/that if she will/whether will she麻烦解释的详点.
首先 你把Ask her if she will go with us分成2句 Ask her 和if she will go with us
把ask her 看成是插入成分 後面就是简单的一般疑问句
就好象 why do you think she is lazy?
do you think 是个插入成分
前後都不用加上其他的成分了

好像不能if or not
貌似是that whether，
不用倒装

if she will or not
that 后应该接一句完整的话，if ...并非一句完整的话
whether she will