Learn Farsi: شما چند کارتن داخل اتاق گذاشته‌اید؟ - How many boxes have you put inside the room?

It comes from the infinitive گذاشتن (to put). To make the present perfect tense, we take the past stem (گذاشت), add an 'e' sound to make the past participle (گذاشته), and then attach the short ending for شما (you), which is اید (-id). Put together, it makes گذاشته‌اید (you have put).

Why is کارتن in the singular form when the English translation says 'boxes'?

In Farsi, nouns that come directly after a number or a question word about quantity, like چند (how many), always stay in their singular form. So we say چند کارتن instead of making the word for box plural.

Is there an Ezafe connecting داخل (inside) and اتاق (room)?

Yes! When you use a location word like داخل (inside) before a noun, you need to connect them with an Ezafe (a short 'e' sound). When spoken, it sounds like dâkhel-e otâgh.

Is کارتن related to the English word 'carton'?

Yes, it is a loanword. However, in Farsi, it is commonly used to refer to any cardboard box (like the ones you use for moving), not just small containers for milk or juice.