Grammar Rule in 30 Seconds
In spoken Czech, the long vowel 'ý' often shifts to the diphthong 'ej' to sound more natural and conversational.
- Shift 'ý' to 'ej' in adjectives: 'dobrý' becomes 'dobrej'.
- Apply this in informal speech, not in formal writing or official speeches.
- Do not shift 'ý' in formal contexts like news broadcasts or academic papers.
Masculine Singular Adjective Shift
| Literary (Formal) | Common (Informal) | Meaning |
|---|---|---|
|
dobrý
|
dobrej
|
good
|
|
nový
|
novej
|
new
|
|
malý
|
malej
|
small
|
|
pěkný
|
pěknej
|
nice
|
|
těžký
|
těžkej
|
hard
|
|
veselý
|
veselej
|
cheerful
|
|
hloupý
|
hloupej
|
stupid
|
|
milý
|
milej
|
kind
|
Meanings
This is a phonological shift where the long vowel 'ý' is replaced by the diphthong 'ej' in colloquial Czech.
Adjective ending
The most common usage in masculine singular nominative adjectives.
“Ten film je dobrej.”
“Mám novej telefon.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Adjective + ej
|
Ten pes je hodnej.
|
|
Negative
|
Není + Adjective + ej
|
Ten pes není hodnej.
|
|
Question
|
Je + Adjective + ej?
|
Je ten pes hodnej?
|
|
Short Answer
|
Je + ej
|
Jo, je hodnej.
|
|
Plural
|
No change
|
Psi jsou hodní.
|
|
Feminine
|
No change
|
Ta fena je hodná.
|
|
Neuter
|
No change
|
To kotě je hodné.
|
フォーマル度スペクトル
Ten film je dobrý. (Talking about a movie)
Ten film je dobrý. (Talking about a movie)
Ten film je dobrej. (Talking about a movie)
Ten film je fakt dobrej. (Talking about a movie)
When to use 'ej'
Context
- Casual Friends/Family
- Texting Social Media
Constraint
- No formal writing Essays/Emails
レベル別の例文
To je dobrej film.
That is a good movie.
Mám novej telefon.
I have a new phone.
Ten pes je hodnej.
That dog is nice.
To je pěknej dům.
That is a nice house.
Je ten úkol těžkej?
Is that task hard?
Můj bratr je veselej.
My brother is cheerful.
Ten kluk je hloupej.
That boy is stupid.
Je to hroznej den.
It is a terrible day.
Dneska je venku pěknej den.
It's a nice day outside today.
Koupil jsem si novej kabát.
I bought myself a new coat.
Ten film byl fakt dobrej.
That movie was really good.
Můj soused je hrozně milej.
My neighbor is very kind.
Je to sice drahej špás, ale stojí to za to.
It's an expensive fun, but it's worth it.
Ten nápad je sice zajímavej, ale nerealistickej.
That idea is interesting, but unrealistic.
Byl to hrozně vtipnej moment.
It was a very funny moment.
Ten člověk je fakt divnej.
That person is really weird.
Je to sice trochu riskantní, ale je to dobrej tah.
It's a bit risky, but it's a good move.
Ten přístup je sice netradiční, ale velmi efektivní.
That approach is unconventional, but very effective.
Je to sice složitej problém, ale zvládneme to.
It's a complex problem, but we will handle it.
Ten výsledek je sice skvělej, ale cesta byla trnitá.
The result is great, but the path was thorny.
Ten argument je sice přesvědčivej, ale chybí mu hloubka.
That argument is convincing, but it lacks depth.
Je to sice ambiciózní plán, ale v praxi je to nepoužitelný.
It's an ambitious plan, but in practice it's unusable.
Ten člověk je sice vzdělanej, ale postrádá empatii.
That person is educated, but lacks empathy.
Je to sice neobvyklej jev, ale v lingvistice je to běžný.
It's an unusual phenomenon, but in linguistics it's common.
間違えやすい
Learners mix up the 'ý' to 'ej' shift with the shortening of long vowels.
Learners apply 'ej' to feminine/neuter nouns.
Learners apply 'ej' to plural adjectives.
よくある間違い
malej holka
malá holka
dobrej den (in a formal email)
dobrý den
nyní -> nynej
nyní
vždy -> vžej
vždy
dobrej psi
dobří psi
to je dobrej auto
to je dobré auto
dobrej (in a news report)
dobrý
dobrej (in a thesis)
dobrý
dobrej (for feminine noun)
dobrá
dobrej (for neuter noun)
dobré
dobrej (in a legal document)
dobrý
dobrej (in a formal speech)
dobrý
文型パターン
To je ___ ___.
Ten ___ je ___.
Je ten ___ ___?
Ten ___ je sice ___, ale...
Real World Usage
To je fakt dobrej nápad!
To pivo je fakt dobrý.
Pěknej fotka!
To je dobrý nápad.
Dám si ten dobrej burger.
To je dobrý příklad.
Listen to the locals
Don't overdo it
Focus on masculine
It's about comfort
Smart Tips
Use 'ej' to sound more natural.
Stick to 'ý'.
Use 'ý' until you hear the other person use 'ej'.
Never use 'ej'.
発音
Diphthong 'ej'
Pronounce it as a smooth glide from 'e' to 'j'.
Casual Statement
Ten film je dobrej ↘
Confident, relaxed statement.
暗記しよう
記憶術
Think of 'ý' as a stiff, straight line (like a soldier) and 'ej' as a relaxed, curvy slide (like a friend).
視覚的連想
Imagine a soldier standing straight ('ý') who suddenly relaxes and slides down a playground slide ('ej') when he gets home to his friends.
Rhyme
When you're with a friend and want to be free, change the 'ý' to an 'ej' for me.
Story
Petr is a very formal man. He always says 'dobrý den'. But when he meets his best friend, he relaxes. He says 'dobrej den'. His friend smiles because he knows Petr is finally comfortable.
Word Web
チャレンジ
For the next 5 minutes, try to identify every masculine adjective you see or hear and mentally convert it to the 'ej' form.
文化メモ
This shift is most prominent in Bohemia. It is the standard for informal speech.
Moravians often use different dialectal forms, but the 'ej' shift is widely understood.
Silesian dialects have their own unique phonology, but the 'ej' shift is recognized.
The 'ý' to 'ej' shift is a result of the natural phonological evolution of the Czech language, moving toward more open diphthongs in the vernacular.
会話のきっかけ
Jaký byl tvůj víkend?
Jaký je ten nový film?
Jaký je tvůj nejlepší kamarád?
Jaký je tenhle úkol?
日記のテーマ
よくある間違い
Test Yourself
Ten film je ___ (dobrý).
Find and fix the mistake:
To je malej holka.
To je ___ nápad.
Ten pes je hodný.
Can I use 'ej' in a thesis?
A: Jaký je ten film? B: Je ___.
ten / dům / je / nový
Match each item on the left with its pair on the right:
Score: /8
練習問題
8 exercisesTen film je ___ (dobrý).
Find and fix the mistake:
To je malej holka.
To je ___ nápad.
Ten pes je hodný.
Can I use 'ej' in a thesis?
A: Jaký je ten film? B: Je ___.
ten / dům / je / nový
dobrý -> ?
Score: /8
よくある質問 (8)
No, it's just informal. It's the standard for spoken Czech.
Only in informal writing like texts or social media.
Only masculine singular nominative adjectives.
You will sound a bit stiff or formal, but it's not wrong.
It's a natural phonological shift in the spoken language.
It's a feature of Common Czech (Obecná čeština), which is widely used.
Yes, but this is the most common one for adjectives.
Listen to Czech podcasts and try to spot the 'ej' endings.
Scaffolded Practice
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2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Adjective declension
German uses case endings, not register-based vowel shifts.
Liaison/Elision
French focuses on sound flow between words.
Dialectal variation
Spanish variation is geographical, not register-based.
Keigo (Honorifics)
Japanese uses vocabulary and verb forms for register.
Diglossia (MSA vs Dialect)
Arabic dialects are much more distinct from MSA than Czech Common is from Literary.
Tone/Register
Chinese is tonal and lacks this kind of inflection.
