The missing boy was last seen ____ near the river.A,to play B,to be playing C,play D,playing 为什么不选A,这里被动语态应该加to啊?选什么?为什么?

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Themissingboywaslastseen____neartheriver.A,toplayB,tobeplayingC,playD,playing为什么不选A,这里被动语态应该加to啊?选什么

The missing boy was last seen ____ near the river.A,to play B,to be playing C,play D,playing 为什么不选A,这里被动语态应该加to啊?选什么?为什么?
The missing boy was last seen ____ near the river.
A,to play
B,to be playing
C,play
D,playing
为什么不选A,这里被动语态应该加to啊?选什么?为什么?

The missing boy was last seen ____ near the river.A,to play B,to be playing C,play D,playing 为什么不选A,这里被动语态应该加to啊?选什么?为什么?
选D.
The missing boy was last seen _playing_ near the river.
这里是see sb. doing sth. 变化而来.see sth. doing sth.表示看到一个瞬间,而不是全过程.
假如本句主动态改为:I saw him play near the river.表示:我看到他在河边玩的全过程.
那么本句就该选A.

I see them play the ball everyday.
They are seen to play.(被动语态中，to 恢复)
See sb. do = be seen to do (被动)
See sb. doing = be seen doing（-ing 被动，to 不要）

选D
see somebody doing 表示看见某人正在做某事。
这里，最后有人看见这个失踪的男孩，他正在河边玩。
因为表示正在，而不是持续的看，所以用doing.

D.用现在分词表示在别人看到时，他正在河边玩耍。play不合语法；to play没有表现出瞬时性；to be playing合语法，但太长了，所以被说英语的人淘汰了。

应该选D吧。因为这个失踪的男孩被看到的时候正在做什么，所以要用正在进行时态。

D,playing 表状态。分词结构短语。

选D
在主动语态中。see句型是see...do(被动语态用be seen to do...),see...doing(被动语态用be seen doing sth)
根据意思原句是‘这个丢失的孩子最后一次被看见正在河附近游泳’固选D

The missing boy was l___ by police in the woods. Last week the missing boy was seen_____by the lake填什么?A walk B walking C walked D have walked the missing boy was last seen ___near the housea playingb to play为什么不能选B而选A when the boy was The old man found the missing boy ——偶然 the police （）looking for the missing boy in the forestis b.was c.ared.were应该选c，但是为什么不选d呢英语翻译child answering the description of the missing boy was found safe and well in London yesterday.well的意思不能省略每个词都要翻译,老师要求的. ( )alone in the room by his parents made the boy cryA.his being B.he was left C.his missing D.because his leaving the ----boy was last seen----near the East Lake A.missing,playing.C.missed,played,我选得C,为什么, At this moment your job is______ (find)the missing boy. The _______ boy was last seen ________ near the East lake.第二个空为什么不是to play啊A missing;playing B missing; play C missed;played D missed;to play 1.The missing boy was last seen ____ near the river.A.playing B.to be playing C.play D.to pl1.The missing boy was last seen __A__ near the river.A.playing B.to be playing C.play D.to play不是“被看见”吗?为什么不选B?8.You can’t have th The boy was monster The boy was a monster the boy was in blue She c_ the passengers and fond that one was missing He found the wallet was missing这句话对吗? The whole class ( ) searching for the missing boy when the heavy rain poured down.A. was B.were C. had been D.would be没有一个人给出了正确答案 The police are still s_____ for the missing boy along the river