过去式:用于一般过去时,做谓语。例:She went to school yesterday.过去分词:1). 用于完成时,与have和had分别构成现在完成(进行 时和过去完成(进行)时,做谓语。例:She has gone to school.2). 与be构成被动语态。例:He is beaten by his father.3). 非谓语动词之一,表示被动,完成的意思,可作定语,表语,补语和状语。例:The boy beaten by his father is my friend.
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