Do you know when tom will come from abroad?为何will在tom之后?

Do you know when tom will come from abroad?
译：
你知道汤姆什么时候从国外来这里?
这是一个从句
主句Do you know
从句when tom will come from abroad?
当成述句变成问句时,通常主句会变成问句形式,而从句的语序不变,保持陈述句语述.
所以 tom will come from abroad是陈述句语序是正确的.
Tom是主语,will come 是谓语,当然要放到前面.