Ja mam dziesięć książek.

I have ten books.

Breakdown of Ja mam dziesięć książek.

• ja: I
• mieć: to have
• książka: the book
• dziesięć: ten

Questions & Answers about Ja mam dziesięć książek.

Why is the pronoun Ja used at the beginning? Is it always necessary in Polish?

Ja means “I.” In Polish, verbs like mam (“I have”) already show the subject by their ending, so you can safely drop Ja and simply say Mam dziesięć książek. Including Ja adds emphasis or clarity (e.g. to contrast with someone else: “Ja mam dziesięć książek, a ty?”).

What part of speech and case is dziesięć?

Dziesięć is a cardinal numeral (“ten”). Here it stands in the nominative case because it’s the subject of counting. Numerals themselves aren’t declined by gender in Polish when they’re 5 or higher—they remain unchanged regardless of the noun that follows.

Why does książek end with -ek? What case is it, and why?

After cardinal numbers from 5 upward (including dziesięć), the counted noun goes into the genitive plural. For książka (singular), the genitive plural form is książek. The -ek ending is the standard genitive plural marker for many feminine nouns.

Does dziesięć agree in gender with the noun?

No. Unlike jeden/ jedna/ jedno (“one”), which does change for grammatical gender, dziesięć is indeclinable and stays the same before masculine, feminine or neuter nouns. The noun’s case (genitive plural here) does all the work.

How do I ask “How many books do you have?” in Polish, and why does it use książek?

You say Ile masz książek?

• Ile = “how many?”
• masz = “you have” (2nd person singular of mieć)
• książek remains genitive plural, because ile always triggers the genitive plural for the noun that follows when asking about quantity.

Is the word order flexible? What about Dziesięć książek mam?

Polish word order is fairly flexible, but the neutral sequence is S–V–O (Subject–Verb–Object): Ja (S) mam (V) dziesięć książek (O). If you front dziesięć książek, you’re stressing the ten books (e.g. “Ten books I have”). It’s not wrong, just a stylistic/ emphatic choice.

How do you pronounce Ja mam dziesięć książek?

Phonetic approximation:
• Ja = “yah”
• mam = “mahm” (short a)
• dziesięć = “d͡ʑɛɕt͡ɕ” → DZHYE-sh-ch
• książek = “kɕɔ̃ʂɛk” → KSHON-shek
Put together: “yah mahm DZHYE-sh-ch KSHON-shek.”