The גזרות: Root Classes That Reshape a Paradigm | Hebrew Grammar

Hebrew has almost no irregular verbs. What it has instead are גְּזָרוֹת (gzarót, singular גִּזְרָה gizrá) — classes of roots that all bend the paradigm in the same way, for the same phonetic reason. A verb is not irregular because a letter disappeared from it; it belongs to the class in which that letter always disappears.

This page names the classes, says what each one does, and hands each to the page that conjugates it. There is not a full paradigm here on purpose.

How the classes are named

Hebrew numbers the three root positions with the letters of the model root פ־ע־ל "do": the first radical sits in the פ slot, the second in the ע slot, the third in the ל slot. A class name then says which slot holds which awkward letter:

פ״נ — first radical is נ
פ״י — first radical is י
ע״ו — middle radical is ו
ל״ה — third radical is ה

The mark between the two letters is a gershayim ״, Hebrew's acronym sign (see geresh and gershayim). Read the names aloud by letter name, as Israelis do: pe-nun, pe-yod, áyin-vav, lámed-hey.

The classes, one line each

Every row below is pa'al, so you can compare like with like. The middle columns are pointed because the vowels are the whole story; where ktiv male differs visibly, the everyday spelling follows in brackets.

גזרה	Past	Future	Infinitive	What happens
שלמים	כָּתַב	יִכְתּוֹב	לִכְתּוֹב	nothing at all — this is the baseline
פ״נ	נָפַל	יִיפּוֹל (ייפול)	לִיפּוֹל (ליפול)	the נ has no vowel of its own and is swallowed by the next letter, which takes a dagesh
פ״י	יָשַׁב	יֵשֵׁב	לָשֶׁבֶת	the י drops out and leaves a tsere behind; the infinitive rebuilds with a ־ֶת ending
פ״א	אָמַר	יֹאמַר	לוֹמַר	the א goes silent and colours the prefix vowel to o; in the 1st person the prefix א and the root's א merge into one letter, אוֹמַר
ע״ו / ע״י	קָם · שָׂם	יָקוּם · יָשִׂים	לָקוּם · לָשִׂים	the middle letter is never a consonant — it is the vowel, so only two consonants ever surface
ל״ה	רָצָה	יִרְצֶה	לִרְצוֹת	the ה is a vowel letter; before any ending it turns into a י (רָצִיתִי)
ל״א	מָצָא	יִמְצָא	לִמְצוֹא	the א stays written everywhere and is simply not pronounced
כפולים	תַּם	יִתַּם	לָתוֹם	2nd and 3rd radicals are identical and collapse into one doubled letter
gutturals א ה ח ע	שָׁמַע · בָּחַר	יִשְׁמַע · יִבְחַר	לִשְׁמוֹעַ · לִבְחוֹר	a guttural refuses a plain shva (it takes a chataf instead) and pulls the vowels around it towards a

Two honest footnotes on that table. כפולים is the thinnest class in modern pa'al — most geminate roots have been levelled to the regular pattern (שָׁדַד, גָּזַז conjugate like כָּתַב), and the old shape survives mainly in a handful of verbs like תַּם and in other binyanim. And the gutturals are not a positional class like the others: א, ה, ח and ע cause trouble wherever they sit, so a root can be guttural and פ״נ and ל״ה at once.

כתבתי לו שלוש פעמים ולא קיבלתי תשובה.

katávti lo shalósh pe'amím veló kibálti teshuvá

I wrote to him three times and never got an answer.

אל תשים את זה שם, זה ייפול.

al tasím et ze sham, ze yipól

Don't put that there, it'll fall. (to a man)

ישבנו בבית קפה עד שסגרו.

yashávnu bevéit kafé ad shesagrú

We sat in a café until they closed.

מה אמרת? לא שמעתי כלום.

ma amárta? lo shamáti klum

What did you say? I didn't hear a thing. (to a man)

שמנו את המזוודות בתא המטען.

sámnu et hamizvadót betá hamit'án

We put the suitcases in the boot.

לא רציתי להעיר אותך, אז יצאתי בשקט.

lo ratsíti leha'ír otkhá, az yatsáti beshéket

I didn't want to wake you, so I left quietly. (to a man)

קראתי את הספר הזה פעמיים ועדיין לא הבנתי אותו.

karáti et haséfer hazé pa'amáyim va'adáyin lo hevánti otó

I've read this book twice and I still haven't understood it.

בחרתי בקורס הזה בגלל השעות.

bakhárti bakúrs hazé biglál hasha'ót

I picked this course because of the hours.

Why the gzarot hurt most in pa'al

The same weak letters exist in all seven binyanim, but they do the most visible damage in pa'al — and there is a structural reason.

Pa'al puts nothing in front of the root in the past or the present. כָּתַב is the root plus vowels; כּוֹתֵב adds only a vowel letter. So when a radical assimilates or turns into a vowel, there is no scaffolding left holding the word up, and what surfaces is a two-letter word: קָם, בָּא, שָׂם, תַּם.

Every other binyan supplies its own prefix — the נ of nif'al, the ה of hif'il and huf'al, the הת of hitpa'el — and the doubled middle radical of pi'el and pu'al does similar work. The word keeps a recognisable frame even when a radical vanishes inside it: הֵבִין is still visibly a hif'il, even though the י of ב־י־ן is nowhere in it.

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This is the binyan where "just learn the paradigm" fails, because there is no single pa'al paradigm — the table above already lists nine shapes. In the other binyanim a weak radical usually bends one cell of an otherwise familiar table; in pa'al it rebuilds the table. Hold them as classes, not as verbs.

The verbs you need first are the weak ones

Here is the fact that reframes the beginner's frustration. Take this guide's own starter list, the twenty pa'al verbs you meet first — אמר, הלך, בא, ראה, ידע, אכל, שתה, כתב, קרא, למד, ישב, קם, גר, נתן, לקח, עשה, רצה, שמע, יצא, עבד.

Count the sound roots in that list: כתב and למד, and that is all. The other eighteen are weak, guttural, or both — and several are two things at once (יצא is פ״י and ל״א; ראה is guttural and ל״ה; נתן is פ״נ at the front and loses its final נ as well).

So the ordinary experience of learning Hebrew is not "regular verbs first, exceptions later". You meet the classes on day one, because the verbs you cannot do without belong to them. The regular paradigm is the one you meet late, and by then it feels easy.

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Take this as permission to stop apologising for the first month. Learners routinely conclude that they are bad at Hebrew because the verbs "keep being exceptions" — but they are not learning exceptions, they are learning nine classes at once, in the order that everyday speech hands them over. The classes are what makes it finite: once קם is filed as a hollow verb, so are גר, רץ, טס and בא, and so are שם and שר in its twin class ע״י.

אני יורד בתחנה הבאה, אתה יכול לזוז?

aní yoréd batakhaná haba'á, atá yakhól lazúz

I'm getting off at the next stop — can you move? (to a man)

Working one out: לרדת

Take לָרֶדֶת larédet "to go down, get off", met cold in a sentence, and walk it back.

Strip the infinitive's ל. What is left is רֶדֶת.
Recognise the ־ֶת ending. A pa'al infinitive that ends in ־ֶת and shows only two consonants is the signature of a lost first radical — the same shape as לָשֶׁבֶת, לָדַעַת, לָלֶכֶת, לָתֵת.
Two visible radicals: ר and ד. The missing letter is at the front.
Which letter? The ־ֶת shape occurs in both פ״נ and פ״י, so do not guess נ. Check the past tense: יָרַד. There is the answer.
Root י־ר־ד, class פ״י, binyan pa'al — filed alongside יָשַׁב and יָדַע, which behave identically.

Step 4 is the step that gets skipped, and skipping it sends you looking for a root נ־ר־ד that does not exist. The full ordered procedure, with eight worked examples, is on identifying a verb's גזרה.

Common Mistakes

1. Counting the infinitive's ת as a root letter. The ־ֶת of לָרֶדֶת, לָשֶׁבֶת and לָדַעַת belongs to the infinitive's shape.

❌ לרדת → שורש ר־ד־ת

Incorrect — the ת is part of the infinitive ending, not a radical. The root is י־ר־ד and the citation form is ירד.

2. Assuming the missing first radical is always a נ. Both פ״נ and פ״י lose theirs; only the past tense settles which.

❌ לרדת → שורש נ־ר־ד

Incorrect — נ־ר־ד is not a root. The past tense of this verb is ירד, so the letter that dropped out is a י: the root is י־ר־ד, class פ״י.

3. Putting a hollow verb's middle letter back into the past tense. The ו of לָגוּר and לָקוּם is a vowel, and it exists only where the paradigm gives it room.

❌ גורתי בתל אביב שנתיים

Incorrect — the ו of ג־ו־ר surfaces in לגור and גר but never before a past-tense ending. It is גרתי בתל אביב שנתיים.

✅ גרתי בתל אביב שנתיים לפני שעברתי צפונה.

gárti betél avív shnatáyim lifnéi she'avárti tsafóna

I lived in Tel Aviv for two years before I moved up north.

4. Keeping the ה of a ל״ה verb in front of an ending. It is a vowel letter, and it always gives way to a י.

❌ עשהתי את זה כבר

Incorrect — the ה of עשה is not a consonant and cannot carry an ending. It becomes a י: עשיתי את זה כבר.

✅ עשיתי את זה כבר אתמול בערב.

asíti et ze kvar etmól ba'érev

I already did that yesterday evening.

Key Takeaways

A גזרה is a root class, not a list of exceptions: every member deforms the paradigm the same way, for the same phonetic reason.
Classes are named by position on the model root פ־ע־ל, with a gershayim between the letters: פ״נ, פ״י, פ״א, ע״ו, ע״י, ל״ה, ל״א — plus שלמים, כפולים and the gutturals.
The deformations in one line each: פ״נ assimilates its נ (ייפול), פ״י loses its י (יֵשֵׁב, לָשֶׁבֶת), פ״א goes silent and turns the vowel to o (יֹאמַר), ע״ו/ע״י surface with only two consonants (קָם, שָׂם), ל״ה swaps its ה for a י before any ending (רָצִיתִי), ל״א keeps a silent א, כפולים collapse two identical radicals, and gutturals take chataf vowels and pull the surrounding vowels towards a.
The damage is worst in pa'al, because pa'al puts no prefix in front of the root — so a lost radical leaves a two-letter word instead of a recognisable frame.
Of the twenty highest-frequency pa'al verbs in this guide, only כתב and למד are sound roots. You meet the classes immediately; the regular paradigm is what arrives late.
The diagnostic: a ־ֶת infinitive showing two consonants means a lost first radical — and you check the past tense to find out whether it was a נ or a י.

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