一道考试题。大家帮忙解答一下

Question

I saw Maggie go to Grandpa Zhang's home just now.
Yes,she is often seen the olld man with his housework.
A．help B．to help C.helping D.helps
这个题选B,对不对

Answer 1

C.helping；;正确；

主动语态：see sb do sth：看见某人做某事；

see sb doing sth：看见某人正在做某事；

被动语态：sb be seen to do sth：被看见做某事；

sb be seen doing sth：某人被看见正在做某事；
翻译：她经常被我们看见正在帮助老人做家务；

因为前面有is，所以是C；

Answer 2

see sb. doing/ see sb do sth. 用在主动语态中
在被动语态中用： be seen to do sth.， 所以答案B
翻译：我刚才看见Maggie去张爷爷家了
是的，人们经常看见她帮老人做家务

Answer 3

C.helping

be seen doing sth. 被看到正在做某事

Answer 4

对
see改为被动为 be seen to

Answer 5

c