2.分词作定语：(1).被修饰的名词于作定语的动词为主动关系，表示该动作正在进行或于主句动作同时发生，或是经常性行为时，用现在分词做定语。The girl (standing there )is my sister .When I got back home I saw a message pinned to the door (reading “sorry to miss you ;will call later).注意；分词短语作后置定语时可以改写成定语从句。The girl (who is standing there )is my sister .When I got back home I saw a message pinned to the door (which read “sorry to miss you ;will call later).(2).如果名词与作定语的动词为被动关系时，则定语有下列三种形式：如果动作已发生或经常性行为，用done The house built is mine .如果动作正在进行，用be
