Her accent will be very much to her disadvantage if she wants to be an actress.为什么用to?
问题描述：
Her accent will be very much to her disadvantage if she wants to be an actress.为什么用to?
答
to one's disadvantage固定短语对某人不利的是
答
to one's disadvantage 是 to one's advantage 的反义词.
前者是”对某人不利“,后者是”对某人有利“.
句子意思：如果她想成为演员,她的口音将会对她很不利.（不利于她发展）
请参考：
It would be to your advantage to agree to his demands.
（同意他的要求,你可能会占据主动.）