Learn Dutch: Heb jij je sleutelbos bij je? - Do you have your bunch of keys with you?

In Dutch, when talking about carrying something on your person, you use the preposition bij. The fixed expression iets bij zich hebben translates to "having something with you" in English. Using met would sound unnatural here.

Why does the sentence use je at the end instead of a reflexive pronoun like zich?

In locative prepositional phrases (describing where something is relative to the subject), Dutch uses standard object pronouns for the first and second person (me, je, ons, jullie). The true reflexive pronoun zich is only used for the third person (like hij heeft het bij zich) and the formal you (u heeft het bij u or bij zich).

We have jij, je, and je in this sentence. Why not use jouw or jou?

The first jij is stressed to emphasize the subject. The middle je is the unstressed possessive "your" (using jouw would unnecessarily emphasize whose keys they are). The final je is the unstressed object pronoun. You could technically say bij jou if you wanted to heavily stress the location, but the unstressed je is the standard, natural choice.

I thought meant "forest". Why is it used in ?