Point-in-time connectives — לפני ש, אחרי ש, כש, ברגע ש — are on temporal conjunctions. This page covers the ones that describe a stretch of time, and it exists because they are the group where a bilingual dictionary is least useful: English hands all three of them the single word while, and in Hebrew they are doing three unrelated jobs.
בזמן ש־: two things genuinely at once
This is the plain one. בזמן ש puts two events on the same clock and says nothing more.
בזמן שהמים רתחו הספקתי לקפל את כל הכביסה.
bizmán shehamáyim ratkhú hispákti lekapél et kol hakvisá
While the water was boiling I got all the washing folded.
בזמן שהילדים בגן אני מנסה לעבוד, ואף פעם לא מספיקה.
bizmán shehayeladím bagán aní menasá la'avód, ve'áf pá'am lo maspiká
While the kids are at nursery I try to work, and I never get through it. (f. speaker)
Its bare form בזמן takes a noun — בזמן הנסיעה, בזמן ההופעה — and on Hebrew Wikipedia the noun frame is actually the commoner of the two: insource:/ בזמן ה/ returns 12,277 articles against 6,888 for insource:/ בזמן שה/ (regex form, 17 August 2026, one shape down both columns; both figures are floors). Which tense goes inside the clause is decided by the event, not by the connective, and that is worked out on temporal clauses and their tense.
בעוד is two constructions wearing one spelling
Now the one that catches careful readers. Look at these two strings:
| String | Reading | What it means |
|---|---|---|
| בעוד שבוע | be'ód shavúa | in a week — a time expression follows |
| בעוד שהוא | be'ód shehú | while he — a clause follows |
They begin with the same five letters and a space, and after that space Hebrew gives you no boundary marker at all: the ש may be the first letter of שבוע, שעה, שנה — precisely the nouns that collocate with time prepositions — or it may be the subordinating ש with a whole clause behind it. Only reading on tells you which.
הרכבת יוצאת בעוד עשר דקות, אין סיכוי שנספיק.
harakévet yotsét be'ód éser dakót, ein sikúy shenaspík
The train goes in ten minutes — there's no chance we'll make it. (בעוד plus a time expression: forward from now)
Before a clause, the dictionaries give בעוד one job and one job only: Milog defines בְּעוֹד as בזמן ש־, כאשר and lists nothing else. In that sense it also takes pronoun suffixes, which is a literary shape worth recognising — בעודי, בעודו, בעודנו.
בעודו מדבר נכנסה המזכירה והושיטה לו פתק.
be'odó medabér nikhnesá hamazkirá vehoshíta lo pétek
While he was still speaking the secretary came in and handed him a note. (literary — בעוד with a suffix, no ש and no separate subject)
What בעוד ש actually does in modern writing
Here the page has to be careful rather than confident, because the dictionaries and the corpus do not agree, and the corpus is not a dictionary.
No dictionary consulted for this guide records a contrastive sense. Milog gives only בזמן ש־, כאשר; בעוד ש is not even a headword anywhere. But read the corpus and the picture is different. Of the first twelve hits of insource:/ בעוד שה/ — 5,322 articles in all, a floor rather than a count, and Wikipedia ranks its results rather than sampling them randomly — eleven are unambiguously contrastive: the north against the south, coastal temperatures against the valley, one measure of circulation against another. The twelfth is ambiguous between contrast and simultaneity. Not one of them is plainly at the moment when.
So the honest statement is an observation about current writing rather than a definition: in modern Hebrew prose, בעוד ש־ overwhelmingly reads as whereas, and the dictionaries have not caught up with it. Read it as a contrast unless the sentence forces simultaneity, and if simultaneity is what you mean, write בזמן ש and remove the doubt.
בצפון ירד גשם כבד, בעוד שבדרום לא ירדה טיפה.
batsafón yarád géshem kavéd, be'ód shebadaróm lo yardá tipá
Heavy rain fell in the north, whereas in the south not a drop came down.
כל עוד is a condition, not a clock
כל עוד is filed under time words and behaves like a conditional. The clue is in its parts: the Academy's dictionary lists כָּל עוֹד as a fixed phrase under עוֹד, whose own definition includes the sense עֲדַיִין, still. So כל עוד means, quite literally, all the while that [something] still holds — and what it introduces is a standing state, with the main clause true only for as long as that state lasts.
That is why the clause normally carries a present tense or a יש, not an event verb, and why the national anthem's opening line — כֹּל עוֹד בַּלֵּבָב פְּנִימָה נֶפֶשׁ יְהוּדִי הוֹמִיָּה — has no finite verb in it at all.
כל עוד יש חשמל אפשר להישאר, אבל אם זה ייפול אנחנו יוצאים.
kol od yesh khashmál efshár lehisha'ér, avál im ze yipól anákhnu yots'ím
As long as there's power we can stay, but if it goes we're leaving.
כל עוד לא חתמת על החוזה אתה עדיין יכול להתחרט.
kol od lo khatámta al hakhozé atá adáyin yakhól lehitkharét
As long as you haven't signed the contract you can still change your mind. (to a man)
Two measurable facts about its shape. First, כל עוד normally takes no ש: insource:/ כל עוד אני / returns 41 against 2 for insource:/ כל עוד שאני /, and the same lean shows on the definite frame, 1,435 against 33. The ש form exists — it is not an error — but it runs at roughly one in forty. Second, a future verb is possible but is the minority shape: insource:/ כל עוד י[א-ת]/ returns 283.
The other two: כל זמן ש־ and תוך כדי ש־
כל זמן ש is the formal twin of כל עוד and says the same thing at greater length: 158 articles on the / כל זמן שה/ frame.
כל זמן שהתיק פתוח אין לנו רשות למסור פרטים.
kol zman shehatík patúakh ein lánu reshút limsór pratím
As long as the file is open we're not permitted to release details. (formal)
תוך כדי ש is the one that gets described as purely spoken, and that description is wrong: insource:/ תוך כדי שה/ returns about 1,150 articles, and reading the first twelve, every one is the genuine construction. It is ordinary in speech and in edited prose. Its noun frame, insource:/ תוך כדי ה/, is commoner still at 2,626. What it adds over בזמן ש is a sense of one action happening in the course of another, often incidentally.
היא ענתה למיילים תוך כדי שהיא מחכה לרופא.
hi antá lameilím tokh kdei shehí mekhaká larofé
She answered emails while she was waiting for the doctor.
תוך כדי הנסיעה הוא נזכר ששכח את המצלמה.
tokh kdei hanesi'á hu nizkár sheshakhákh et hamatslemá
Partway through the drive he remembered he'd left the camera behind. (the noun frame, which is the commoner one)
| Connective | Reading | Job | Register |
|---|---|---|---|
| בזמן ש־ | bizmán she- | simultaneity, neutral | every register |
| תוך כדי ש־ | tokh kdei she- | in the course of, often incidental | speech and edited prose alike |
| בעוד ש־ | be'ód she- | reads as whereas in modern prose | written |
| בעוד + time | be'ód | in an hour, a week, a fortnight | every register |
| כל עוד | kol od | conditional — for as long as X still holds | every register |
| כל זמן ש־ | kol zman she- | the same, at greater length | formal |
Common Mistakes
1. Using בעוד ש for plain simultaneity. Not ungrammatical — this is what the dictionaries say the word means — but an Israeli reader will hear a contrast you did not intend, because that is what the construction does in practice.
✅ בזמן שדיברתי איתה הוא סידר את המטבח.
bizmán shedibárti itá hu sidér et hamitbákh
While I was talking to her he tidied the kitchen. (two things at once, and nothing more)
✅ בעוד שאני שטפתי כלים, הוא ישב וצפה בטלוויזיה.
be'ód she'aní shatáfti kelím, hu yasháv vetsafá batelevízya
While I did the washing-up, he sat and watched television. (the same clock — but now with a pointed contrast, which is the reading בעוד ש carries)
2. Dropping the ש after תוך כדי. The noun frame is so common that the connective gets used as though it were a preposition in front of a clause too.
❌ תוך כדי הוא דיבר הטלפון שלו צלצל שלוש פעמים
Incorrect — a clause needs the ש: תוך כדי שהוא דיבר הטלפון שלו צלצל שלוש פעמים. With a noun there is none: תוך כדי השיחה.
✅ תוך כדי שהוא דיבר הטלפון שלו צלצל שלוש פעמים.
tokh kdei shehú dibér hatélefon sheló tsiltsél shalósh pe'amím
While he was talking his phone rang three times.
3. Using בזמן ש for a condition. English as long as covers both a stretch of time and a standing condition; Hebrew splits them, and בזמן ש cannot carry the conditional half.
❌ בזמן שיש לך ויזה אתה יכול להישאר בארץ
as long as you have a visa you can stay in the country
Incorrect as that meaning — בזמן ש means 'at the time when', so this reads as one particular stretch of time rather than a standing condition. That is כל עוד: כל עוד יש לך ויזה אתה יכול להישאר בארץ.
✅ כל עוד יש לך ויזה בתוקף אתה יכול להישאר בארץ.
kol od yesh lekhá víza betókef atá yakhól lehisha'ér ba'árets
As long as you have a valid visa you can stay in the country. (to a man)
4. Attaching ש to כל עוד. This one is a lean, not a rule — the ש form is attested and nobody will fail to understand you. But at roughly one in forty it is the marked option, and leaving it off is what a native writer does.
✅ כל עוד אני גר כאן אני לא צריך רכב.
kol od aní gar kan aní lo tsaríkh rékhev
As long as I'm living here I don't need a car. (m. speaker — the ordinary shape)
✅ כל עוד שאני גר כאן אני לא צריך רכב.
kol od she'aní gar kan aní lo tsaríkh rékhev
The same sentence with a ש — attested, understood, and about forty times rarer.
Key Takeaways
- בזמן ש־ is plain simultaneity and carries no extra meaning. Its bare form takes a noun — בזמן הנסיעה — and that frame is actually the commoner one in writing.
- בעוד is two constructions. Before a time expression it means in: בעוד עשר דקות. Before a clause it is the connective — and the ש that opens that clause is indistinguishable at a glance from the first letter of שבוע or שעה.
- In modern prose בעוד ש־ reads as whereas. No dictionary consulted here records that sense, but eleven of the first twelve corpus hits are contrastive. Treat it as an observation about usage, and write בזמן ש when you mean simultaneity.
- בעוד takes suffixes in its clause sense: בעודי, בעודו, בעודנו — a literary shape to recognise rather than produce.
- כל עוד is conditional. It sits under עוֹד, whose dictionary sense includes עֲדַיִין, and it introduces a standing state: כל עוד יש חשמל. It normally takes no ש (about forty to one).
- כל זמן ש־ is its formal twin, and תוך כדי ש־ — about 1,150 Wikipedia articles — is not merely spoken: it is ordinary in edited prose too.
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Start learning Hebrew →Related Topics
- לפני ש־, אחרי ש־, עד ש־, מאז ש־A2 — Hebrew builds its time connectives by bolting ש onto a preposition: לפני הארוחה takes a noun, לפני שאכלנו takes a whole clause, and the ש is the only thing that tells them apart. This page covers the six of them — לפני ש, אחרי ש, עד ש, מאז ש, ברגע ש and כל פעם ש — plus the written בטרם and לאחר ש, and the exclamative עד שהגעת!
- Temporal Clauses and Their TenseB1 — After כש־, אחרי ש־, לפני ש־, עד ש־, מאז ש־ and בזמן ש־, Hebrew puts a future verb in the clause when the event is in the future — אחרי שאסיים, אלך הביתה — where English forces a present. All six need a ש in front of a clause, and their bare twins לפני, אחרי and בזמן take a noun instead.
- לעומת זאת, מצד שני, יחד עם זאתB2 — English says on the other hand for three different logical relations; Hebrew keeps them apart. לעומת זאת compares, מצד שני weighs (and needs its partner מצד אחד), יחד עם זאת concedes — and Milog's gloss for that last one is simply wrong, which this page shows from the construction rather than asserting.
- Time Adverbs: היום, אתמול, מחר, כבר, מידA1 — The words that put a sentence in time — and the trap hiding inside half of them: היום, הערב and הקיץ are noun phrases carrying a definite article, so הבוקר is 'this morning' while בבוקר is 'in the morning', and no amount of translating from English will tell you which one a Hebrew speaker wants.
- כש־ and כאשר: WhenA2 — כש־ is the everyday when — an attached prefix taking a whole clause, as in כשהגעתי הביתה גיליתי שאין חשמל — and כאשר is its formal twin with identical syntax. The rule that decides whether your sentence works is the tense: for a future event Hebrew puts a future verb inside the clause, כשנחזור מהחופשה נתחיל לחפש דירה, exactly where English forces a present.