Can を used with だ/です? 君沢さんを犯人だと思い込む I came across the following passage in a mystery manga. The main character is explaining that the as of yet unknown criminal intentionally made the listener think that Kimisawa was the criminal (though she is not). > **** > It's likely that that guy () incorporated it into his plans that you'd be under the impression that the criminal was Kimisawa. He made you smell that perfume on purpose! Unless I am mistaken, it seems to me that the subject/complement of is denoted with which I thought was unacceptable. Could someone please explain when and if this is allowable?

`AB` in isolation makes little sense (although there are minor exceptions). This `` is a common pattern which appears along with various verbs for assuming, regarding, etc.

* AB to regard A as B
* AB to consider A B
* AB to assume A is B
* AB to suppose A as B
* AB to think of A as B
* AB to mistake A as B
* AB to make a wrong assumption that A is B
* AB to define A as B
* AB to take A as B
* AB to interpret A as B



So `B` is like `as B`, and these verbs can take both and at the same time.

**EDIT:** before can be omitted in many cases. (without ) and **** are equally correct. For details, see Difference between vs before and grammatical and semantic difference of "" and ""