can see people _____ paper on windows of the shops.We can see people _____ paper on windows of the shops.A.put B.are putting C.puts D.to put为什么是选A不是选B?

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canseepeople_____paperonwindowsoftheshops.Wecanseepeople_____paperonwindowsoftheshops.A.putB.areputt

can see people _____ paper on windows of the shops.We can see people _____ paper on windows of the shops.A.put B.are putting C.puts D.to put为什么是选A不是选B?
can see people _____ paper on windows of the shops.
We can see people _____ paper on windows of the shops.
A.put B.are putting C.puts D.to put
为什么是选A不是选B?

can see people _____ paper on windows of the shops.We can see people _____ paper on windows of the shops.A.put B.are putting C.puts D.to put为什么是选A不是选B?
see sb.do sth.
看见某人做某事,这是一个固定搭配.如果变成主从句形式
We can see that people _____ paper on windows of the shops
就应该选B而不选A了.

see sb. do sth. 看见某人作过某事
see sb. doing sth.看见某人在做某事
由 see 的结构可以看出,后面的动词要不用 动词原形,要不就用 动名词,所以答 A, see不能和 B,C D 用在一起

选A.
see sb doing sth 看见某人正在做某事,强调动作正在进行。
see sb do sth 看到某人做某事,强调动作已完成。

see sb do sth/see sb doing sth
句型,就这样

因为AREAMFEMFAMEAFN,

只有see sb do sth和see sb doing sth两种用法
所以选A