Breakdown of Češalj je u torbi; uzela sam ga jer se često češljam u tramvaju.
Questions & Answers about Češalj je u torbi; uzela sam ga jer se često češljam u tramvaju.
Because u (meaning in) takes the locative case when it describes location (where something is).
- torba (nom.) → u torbi (loc.)
If you were talking about motion into the bag (where to), you’d use accusative: u torbu.
In Croatian, present-tense forms of biti (sam/si/je/smo/ste/su) are usually clitics and tend to go in the so-called “second position” of the clause (right after the first chunk).
So Češalj je u torbi is the natural clitic placement.
In casual speech, yes, people sometimes drop je in simple present statements, especially in short, “note-like” sentences: Češalj u torbi.
In neutral/standard writing, Češalj je u torbi is safer and more complete.