急求__by some of his students,he went into the room 为什么用Followed 而不用following?

急求__by some of his students,he went into the room 为什么用Followed 而不用following?
英语人气:491 ℃时间:2020-02-25 15:54:28
优质解答
by 表被动,用过去分词表被动,而用ing动词表主动
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