Kad narežem grožđe i jagode, stavim ih u drugu posudu i nosim u park.

Narežem is 1st person singular present of narezati (perfective). It means “(to) cut up / slice (completely / into pieces).”
Croatian often pairs:

• imperfective: rezati = “to be cutting / to cut (as a process, repeatedly)”
• perfective: narezati = “to cut up / to finish cutting”

Here, narežem fits because the cutting is treated as a completed step before the next actions.

They’re just different noun types:

• grožđe is a collective/mass noun (neuter singular) for “grapes”
• jagoda (strawberry) is a countable noun, so “strawberries” is plural: jagode

So the sentence mixes “grapes (as a mass)” + “strawberries (countable plural).”

Because u + accusative is used for motion/direction into something (“put into”).

• u drugu posudu = “into another container” (movement)
• u drugoj posudi (locative) would mean “in another container” (location), which would fit verbs like “is/are” or “stay,” not “put.”

Drugu is the accusative feminine singular form of drugi. It can mean:

• the second (in an ordered sequence), or
• another / a different one (common in everyday speech)

Here, the natural reading is another container (a different bowl/container than the first one).

They describe two separate actions:

• stavim = “I put (them)” (a placement action)
• nosim = “I carry / take (them)” (transport)

Also, aspectually:

• staviti is typically perfective → a single completed action (“put (once)”)
• nositi is typically imperfective → carrying as an ongoing action/process (“carry/take”)

So the pairing is very natural: first you place them into a container, then you carry them to the park.

Yes. The present tense of an imperfective verb like nosim can mean:

• I am carrying (to the park) (right now), or
• I take/carry (to the park) as a routine/habit

In this sentence, with Kad…, it’s typically understood as a habitual sequence: “When I cut them, I put them… and (then) take them to the park.”