Basic Verbs to be (być) and to have (mieć)
Learn the two most essential Polish verbs: 'być' (to be) and 'mieć' (to have), including their conjugations, essential case rules, and common pitfalls regarding age and negation.
Learning goals
- Master the present tense conjugations of być and mieć.
- Understand when to use the Instrumental case with być (professions/roles).
- Understand when to use the Accusative case with mieć (direct objects).
- Learn the "Age Rule" and the "Negation Rule" (Genitive trap).
- Recognize why Polish is a pro-drop language.
Grammar rules
Polish is a pro-drop language. You rarely need to use subject pronouns (ja, ty, on, etc.) because the verb ending clearly indicates the subject. Only use pronouns for emphasis.
The Verb Być (To Be)
Być is highly irregular and must be memorized. When defining a role, profession, or nationality (e.g., "I am a student"), you must use the Instrumental Case (Narzędnik). If you are using an adjective alone (e.g., "I am tired"), use the nominative form.
The Verb Mieć (To Have)
Mieć follows the "-am/-asz" conjugation pattern and is generally regular. When using mieć to state possession, the object you have is the direct object and must be in the Accusative Case (Biernik).
The Negation Trap
- Negating być is simple: add nie before the verb.
- Negating mieć (nie mieć) triggers a shift from the Accusative case to the Genitive case (Dopełniacz).
Declension / Conjugation patterns
Present Tense Conjugation
| Person | Być (To be) | Mieć (To have) |
|---|---|---|
| Ja (I) | jestem | mam |
| Ty (You) | jesteś | masz |
| On/Ona/To | jest | ma |
| My (We) | jesteśmy | mamy |
| Wy (You pl.) | jesteście | macie |
| Oni/One (They) | są | mają |
Examples
| Polish | English | Notes |
|---|---|---|
| Jestem studentem. | I am a student. | "Student" uses Instrumental case (-em). |
| Jesteś zmęczony. | You are tired. | Adjective only: use Nominative. |
| Mam telefon. | I have a phone. | Accusative (stays same as Nominative). |
| Mam kawę. | I have coffee. | Accusative (-a changes to -ę). |
| Nie mam czasu. | I don't have time. | Negation triggers Genitive (-u). |
| Mam 25 lat. | I am 25 years old. | Literal: "I have 25 years." |
In English, we use "to be" for age (e.g., "I am 20"). In Polish, you must use "to have" (mieć). Saying "Jestem 20" is incorrect. Use: Mam 20 lat (literally: "I have 20 years").
Common mistakes
- Using pronouns unnecessarily: Using Ja jestem instead of just Jestem. Only use the pronoun if you need to emphasize "I" (as opposed to someone else).
- Profession/Role in Nominative: Saying "Jestem student" instead of "Jestem studentem."
- Age confusion: Using the verb być for age (e.g., "Jestem 20 lat" is incorrect).
- Negation errors: Failing to switch to the Genitive case after nie mieć. Example: "Nie mam samochód" should be "Nie mam samochodu."
Quick recap
- Use Instrumental with być when describing a profession or role (e.g., Jestem Polakiem).
- Use Accusative with mieć when describing what you possess (e.g., Mam psa).
- When you negate mieć, you must switch the object to Genitive (e.g., Mam psa $\rightarrow$ Nie mam psa).
- Drop subject pronouns unless you need specific emphasis.
- Always use mieć for age.