She is often seen ( )the old man with his housework.A.to help B.help C.helps该选哪个呢

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She is often seen ( )the old man with his housework.A.to help B.help C.helps该选哪个呢

She is often seen ( )the old man with his housework.A.to help B.help C.helps该选哪个呢
She is often seen ( )the old man with his housework.A.to help B.help C.helps该选哪个呢

She is often seen ( )the old man with his housework.A.to help B.help C.helps该选哪个呢
都不对哦~用helping
be seen doing sth.被人看到在做什么事.

see sb do sth
变成被动语态的话 就要加to
所以选择A

A
be seen to do被看见做某事
see sb do看见某人做某事
固定搭配的短语

选A
一般时态用be seen to do是可以的
不过个人觉得这里用helping更好

没错,如果只有这3个答案选A ,最合理的是helping

选A
被动语态,be seen to do

正确答案是A
如果是主动语态see sb do sth 省略to是对的,
但是在被动语态时to要还原,不能省略,高中基础语法