误 Looked down upon as a second-class citizen, he found himself a total stranger in that foreign country.
正 Looked down upon as a second-class citizen, he found himself a total alien in that foreign country.
析stranger 是指一个人由于风俗、习惯上的不同而感到自己是外人; 而如果因被人看不起而感到自己是外人,要用alien。
他对我来说是一个陌生人。误 He is a stranger for me.
正 He is a stranger to me.
析 to在这里表示“对…来说”,不能用其他介词替代。
我对美国的生活很不习惯。误 I'm a complete stranger for American life.
正 I'm a complete stranger to American life.
析 表示“对…不习惯”,应该说 a stranger to...,其中介词 to 不能改用 for。