The food is prepared,cooked and served by the street kids.为什么be+prepared?不是加ing?

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The food is prepared,cooked and served by the street kids.为什么be+prepared?不是加ing?
The food is prepared,cooked and served by the street kids.为什么be+prepared?不是加ing?

The food is prepared,cooked and served by the street kids.为什么be+prepared?不是加ing?
很明显的被动语态,即be done结构,sth.be done by sb.
doing通常表主动,done表被动
记住这点就很容易了啊
不懂就追问呐~

be+prepared是被动语态

被准备,, preparing 是主动的。food不能自己准备

是被动语态,食物是被准备、被烹饪的