Grammar Rule in 30 Seconds
To form the past tense in Czech, combine the past form of 'být' with the l-participle of your main verb.
- Use 'jsem, jsi, jsme, jste' for 1st/2nd person: 'Já jsem četl' (I read).
- 3rd person singular/plural drops the auxiliary 'být': 'On četl' (He read).
- The l-participle must agree with the subject's gender: 'Ona četla' (She read).
Past Tense Conjugation (Verb: Dělat)
| Person | Masculine | Feminine | Neuter |
|---|---|---|---|
|
1st Sing
|
jsem dělal
|
jsem dělala
|
-
|
|
2nd Sing
|
jsi dělal
|
jsi dělala
|
-
|
|
3rd Sing
|
dělal
|
dělala
|
dělalo
|
|
1st Plur
|
jsme dělali
|
jsme dělaly
|
-
|
|
2nd Plur
|
jste dělali
|
jste dělaly
|
-
|
|
3rd Plur
|
dělali
|
dělaly
|
dělala
|
Common Informal Contractions
| Full | Informal |
|---|---|
|
jsem
|
sem
|
|
jsi
|
si
|
|
jsme
|
sme
|
Meanings
The auxiliary 'být' is used to construct the past tense for 1st and 2nd person subjects, while 3rd person forms rely solely on the l-participle.
Past Tense Auxiliary
Indicates actions completed in the past.
“Já jsem spal.”
“Ty jsi jedl.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Subj + Aux + Participle
|
Já jsem četl
|
|
Negative
|
Subj + Ne-Participle
|
Já jsem nečetl
|
|
Question
|
Aux + Subj + Participle
|
Četl jsi to?
|
|
3rd Pers Aff
|
Subj + Participle
|
On četl
|
|
3rd Pers Neg
|
Subj + Ne-Participle
|
On nečetl
|
|
3rd Pers Q
|
Participle + Subj?
|
Četl on?
|
|
Short Ans
|
Aux/Participle
|
Ano, jsem / Ne, nečetl
|
正式程度
Pracoval jsem. (Work/Daily)
Pracoval jsem. (Work/Daily)
Sem pracoval. (Work/Daily)
Sem makal. (Work/Daily)
Past Tense Components
Auxiliary
- jsem I am (past)
- jsi you are (past)
Participle
- -l masculine
- -la feminine
Auxiliary Usage
Forming the Past
Is it 1st or 2nd person?
按水平分级的例句
Já jsem jedl.
I ate.
Ty jsi pil.
You drank.
On spal.
He slept.
Ona četla.
She read.
Včera jsem pracoval v Praze.
Yesterday I worked in Prague.
My jsme byli v kině.
We were at the cinema.
Vy jste viděli ten film?
Did you see that movie?
Oni nechtěli jít domů.
They didn't want to go home.
Kdybys mi to řekl, pomohl bych ti.
If you had told me, I would have helped you.
Už jsme to všechno připravili.
We have already prepared everything.
Ona se rozhodla, že odejde.
She decided that she would leave.
Nikdo z nich to neudělal.
None of them did it.
Byli jsme si jisti, že to zvládneme.
We were sure that we would manage it.
Když jsem přišel, už byli pryč.
When I arrived, they were already gone.
Celý den jsme se snažili to opravit.
We spent the whole day trying to fix it.
Předpokládalo se, že to bude snadné.
It was assumed that it would be easy.
Ačkoliv jsme se velmi snažili, výsledek nebyl uspokojivý.
Although we tried very hard, the result was not satisfactory.
Byl to právě on, kdo to celé vymyslel.
It was he who invented the whole thing.
Kdyby byli bývali přišli dříve, stihli by to.
If they had come earlier, they would have made it.
Tato skutečnost byla dlouho přehlížena.
This fact was long overlooked.
Byvše poučena o rizicích, rozhodla se nepokračovat.
Having been warned about the risks, she decided not to continue.
Kéž by byli bývali zůstali déle.
If only they had stayed longer.
Nebylo by bývalo lepší to říct hned?
Wouldn't it have been better to say it immediately?
Jakmile byli dokončili práci, odešli.
As soon as they had finished the work, they left.
容易混淆
Learners think 'byl' is always the helper.
Mixing up 'je' and 'byl'.
Forgetting that the verb changes with the subject's gender.
常见错误
On je dělal
On dělal
Já dělal
Já jsem dělal
Ona dělal
Ona dělala
My jsme dělal
My jsme dělali
Ty jsi dělala (to a man)
Ty jsi dělal
Oni dělaly (mixed group)
Oni dělali
My jsme byli šli
My jsme šli
Nejsem dělal
Nedělal jsem
Byl jsem pracoval
Pracoval jsem
Jsem to udělal včera
Udělal jsem to včera
Byl by býval přišel
Kdyby byl přišel
句型
Já jsem ___ včera.
___ jsi včera v kině?
My jsme ___ celý den.
Ona ___ to, co jsi řekl.
Real World Usage
Co jsi dělal?
Pracoval jsem v mezinárodní firmě.
Dnes jsem byl v Praze!
Kde jste byli ubytovaní?
Objednal jsem si pizzu.
Tento výzkum byl proveden v roce 2020.
Gender Matters
No Auxiliary in 3rd Person
Clitic Placement
Casual Speech
Smart Tips
If you are a man, use -l. If you are a woman, use -la.
Always use the full 'jsem' instead of 'sem'.
Check if you added 'je'. If you did, delete it!
Attach 'ne-' directly to the verb, not the auxiliary.
发音
Clitic reduction
In fast speech, 'jsem' often becomes 'sem'.
L-participle ending
The 'l' is often soft in feminine/plural forms.
Statement
Pracoval jsem. ↘
Finality
Question
Pracoval jsi? ↗
Inquiry
记住它
记忆技巧
Jsem, jsi, jsme, jste — these four keep the past alive for me and you!
视觉联想
Imagine a 'helper' robot (the auxiliary) that only shows up when you talk about yourself or the person you are looking at. When you talk about someone else (3rd person), the robot hides behind a tree.
Rhyme
For I and you, the helper is due. For he and she, the helper is free.
Story
Yesterday, I (jsem) walked. You (jsi) talked. But he just sat there. We (jsme) laughed, you (jste) cried, and they just watched.
Word Web
挑战
Write 5 sentences about what you did yesterday using different persons.
文化笔记
Czechs often drop the auxiliary in very casual speech, but it's considered non-standard.
Some dialects have specific l-participle variations.
Always use the full auxiliary forms in formal writing.
The Czech past tense evolved from the Old Church Slavonic perfect, which used a participle and the verb 'to be'.
对话开场白
Co jsi dělal včera?
Kde jsi byl na dovolené?
Co jsi studoval na univerzitě?
Jak jsi se cítil po tom projektu?
日记主题
常见错误
Test Yourself
Já ___ pracoval.
On ___ včera v kině.
Find and fix the mistake:
Ona je dělala.
Arrange the words in the correct order:
All words placed
Click words above to build the sentence
We ate.
Answer starts with: My ...
Ty ___.
Match each item on the left with its pair on the right:
___.
Score: /8
练习题
8 exercisesJá ___ pracoval.
On ___ včera v kině.
Find and fix the mistake:
Ona je dělala.
včera / jsem / pracoval / doma
We ate.
Ty ___.
1st sing -> ?
___.
Score: /8
常见问题 (8)
It's a historical feature of Czech. The auxiliary 'být' is only needed to mark 1st and 2nd person.
If you are talking about a mixed group, use the masculine animate form (e.g., 'dělali').
Yes, 'byl' is the past tense of the verb 'to be' itself, not a helper for other verbs.
Technically yes, but it's rare. It usually follows the first stressed word.
Add 'ne-' to the l-participle. 'Já jsem nepracoval'.
Yes, some verbs like 'jít' (to go) have irregular forms like 'šel'.
It's a common informal contraction used in texting and speech.
No, the auxiliary 'jsem/jsi/jsme/jste' is gender-neutral.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Pretérito perfecto
Czech participles change for gender; Spanish ones do not.
Passé composé
French requires choosing between 'avoir' and 'être' as auxiliaries.
Perfekt
German requires choosing between 'haben' and 'sein'.
Ta-form
Japanese is agglutinative; Czech is analytic in the past.
Perfective aspect
Arabic is synthetic; Czech is analytic.
Le particle
Chinese does not conjugate verbs.
