两个都对,看例子: 如果用to 后面接 do sth.或者名词,如果是for,则只能是名词,通常这里的名词都是人称代词。 This book is difficult for me. This book is difficult to read. Carrying so many packages is burdensome to him. Carrying so many packages is burdensome for him.
第一个对 buy something(sth.) for somebody(sb.)为某人买某物 表示目的或一段时间用介词for give something(sth.) to somebody(sb.)给某人某物 动词不定式也用to It was really a great contribution to their career expla...