we sold the house---we bought ten years ago 顺便说一下什么时候用 whom

填 that /which 。 定语从句, 修饰 the house , the house 在从句中作 bought 的宾语,所以关系词用 which/that 先行词是人而不是物,并在从句中充当宾语,关系词用whom 。 I know the boy whom you were talking with just now 。