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he was seen to come into the room last night 为什么用seen

来源：百度知道编辑：UC知道时间：2024/05/15 20:20:34

为了做老班布置的题..急！

童鞋
被动语态。BE动词加上过去分词
see的过去式和过去分词都是seen.
但是翻成主动句比较好。
意为
昨晚有人看到他进入那个房间的。

“他被看到…”被动语态
seen是see的过去分词

英语教师回答：
主动句 see sb. do sth 看见某人做（过）某事
do sth 是省略 to 的动词不定式
被动语态 be seen to do sth 被看见做（过）某事
被动语态中to 不能省略

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