无标志被动句 notional passive sentences

In some Chinese, the subject of the sentence is itself an object of an action . Structurally, it is no different from a sentence in which the subject is the doer of the action, except that it is obviously a passive notion. The notional passive sentence may be used to emphasize the description of the object of the action. The subject of the sentence is usually a definite object.

Foe example:
越剧票已经买好了。
那部小说看过没有.?
饭已经做好了，还没有拿进去。
旅行的事儿她知道得很多。