keep a secret for sb 和keep a secret to sb的区别
记得老师说keep a secret for sb是为谁保守秘密
keep a secret to sb是对谁保守秘密
但是在8A英语书上49页有一个词组是keep the secret to themselves这词组意思是他们相互保守秘密.那么不是应该用for么.
马上考试了!请高人给详细解释!谢谢!