The 被…所 and 为…所 structures
The 被…所… 
and 为…所… structures are used to emphasize a subject that performs an act in passive sentences.
and 为…所… structures are used to emphasize a subject that performs an act in passive sentences.Scheme
object
who? what?
被/为
subject
whom? what?
所
action
Pay attention
Learn more about subjects and objects in passive sentences in the paragraph “The passive voice with 被, 叫 and 让” (see link below).
Examples
这种政策是不为人们所接受的
Such a policy is not accepted by the people
zhè zhǒng zhèngcè shì bù wéi rénmen suǒ jiēshòu de
他这种态度，为人类社会所不容
His attitude is not tolerated by society
tā zhè zhǒng tàidu, wéi rénlèi shèhuì suǒ bùróng
我们被这部电影所感动
This movie touched us
wǒmen bèi zhè bù diànyǐng suǒ gǎndòng
他被同学们所嘲笑
He is mocked by his classmates
tā bèi tóngxuémen suǒ cháoxiào