לא: The Basic Negator | Hebrew Grammar

Almost every negative sentence in Hebrew is built with one word: לֹא lo. It has no forms, it needs no helper, and it goes straight in front of whatever it is denying. This page is about that word — where it stands, what it attaches to, and the things English speakers keep trying to add to it that Hebrew does not want. The separate negative word for there isn't and I haven't got is אין, and negative requests (אל תלך) are on אל plus the future.

One word, no forms

לא never changes. Not for gender, not for number, not for person, not for tense. Whatever you are negating, and whoever is doing it, the word is לא.

What is negated	Positive	Negative
past verb	הלכתי	לא הלכתי
present verb (בינוני)	היא מבינה	היא לא מבינה
future verb	הם יבואו	הם לא יבואו
adjective	אני רעב	אני לא רעב
noun predicate	הוא רופא	הוא לא רופא
infinitive	החלטנו לספר	החלטנו לא לספר

Read the last two rows next to each other and you have the whole of Hebrew negation in miniature. הוא לא רופא is a complete sentence with no verb in it, because there is no present-tense is in Hebrew to negate — the subject, the negator and the predicate are all it needs. That absence is set out on Hebrew has no 'am', 'is' or 'are', and it is the reason the negative looks so short.

לא הלכתי לפגישה, פשוט שלחתי מייל.

lo halákhti lapgishá, pashút shalákhti meil

I didn't go to the meeting — I just sent an email.

אני לא מצליח לפתוח את הקובץ הזה.

aní lo matslíakh liftóakh et hakóvets hazé

I can't get this file to open. (m. speaker)

היא לא באה אתמול, היא הייתה חולה.

hi lo bá'a etmól, hi haytá kholá

She didn't come yesterday — she was ill.

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Count the words. לא הלכתי is two; I didn't go is three, and the extra one is an auxiliary carrying the tense. Hebrew has no such auxiliary anywhere in the language, so the tense stays where it belongs — inside the verb — and the negator is a pure, tenseless "not". If you catch yourself hunting for the Hebrew for did, stop: there is nothing to find.

לא attaches to the word right after it

This is the rule that repays attention. לא does not negate "the sentence"; it negates the element immediately following it, and moving it moves the meaning.

אני לא הזמנתי את זה, זאת טעות.

aní lo hizmánti et ze, zot ta'út

I didn't order this — it's a mistake.

לא אני הזמנתי את זה, תשאל את דני.

lo aní hizmánti et ze, tish'ál et dáni

I'm not the one who ordered this — ask Dani. (to a man)

Same five words at the front, one moved, two different claims. In the first the ordering did not happen; in the second it certainly happened, just not by me. Nothing marks the difference except which word לא is standing in front of, so keep the two words glued together: negate the verb, and לא goes in front of the verb. What falls inside the negation in longer sentences is worked out on the scope of the negation.

לא is also a whole answer, and it takes reinforcements

On its own, לא is the word no. It is also the base for a small set of everyday intensifiers, all of them ordinary conversational Hebrew.

Phrase	Reads	Force
לא	lo	plain no
ממש לא	mamásh lo	definitely not (informal)
בכלל לא	bikhlál lo	not at all
לא ולא	lo veló	absolutely not (emphatic, a shade formal)
…, לא?	lo?	a tag: …, isn't it? (informal)

היית שם בסוף? — לא, ויתרתי.

hayíta sham basóf? lo, vitárti

Did you end up going? — No, I gave it a miss. (to a man)

אתה כועס? — ממש לא, סתם עייף.

atá ko'és? mamásh lo, stam ayéf

Are you annoyed? — Not at all, just tired. (to a man)

בכלל לא הבנתי מה הוא רצה ממני.

bikhlál lo hevánti ma hu ratsá miméni

I didn't understand at all what he wanted from me.

אתה בא איתנו, לא?

atá ba itánu, lo?

You're coming with us, aren't you? (informal, to a man)

That last one is worth a moment. English builds a tag question by rebuilding the auxiliary and flipping its polarity — you're coming, aren't you, he went, didn't he. Hebrew has one tag for all of them, and it is just the word לא.

Negating an infinitive

לא goes in front of the infinitive, between it and the verb that governs it. No extra word appears.

החלטנו לא לספר לה עד אחרי החג.

hekhlátnu lo lesapér la ad akharéi hekhág

We decided not to tell her until after the holiday.

Note that החלטנו לא לספר (we decided not to tell) and לא החלטנו לספר (we didn't decide to tell) are two different decisions. Again: לא negates what comes next.

A clause with אף אחד or כלום keeps its לא

English cancels its negatives — nobody came, with one negative word, not two. Hebrew agrees with itself instead: the negative pronoun and the negator both appear, and the sentence is negative once.

אף אחד לא ענה לי בטלפון כל הבוקר.

af ekhád lo aná li batélefon kol habóker

Nobody answered the phone all morning.

לא אמרתי כלום, אני נשבע.

lo amárti klum, aní nishbá

I didn't say anything — I swear. (m. speaker)

The same holds for שום דבר, אף פעם and אף אחד מהם. The system is set out in full on double negation.

Two register facts, not two errors

לא in front of a participle is normal Hebrew. You will be told that the "correct" negative of a present-tense verb is the inflected אֵינוֹ — הוא אינו מבין rather than הוא לא מבין. The Academy of the Hebrew Language's own discussion of the question holds that לא with a participle is entirely natural for present-day speakers. What language editors recommend is אינו in writing and in formal speech — a stylistic preference, not a correction. And when the predicate comes before the subject, לא is not merely tolerated but the Academy's own recommendation, which is where the ancient evidence sits: the Bible has כִּי לֹא שֹׂנֵא הוּא לוֹ (Deuteronomy 19:6) and the Jerusalem Talmud לא דומה המבייש את הגדול למבייש את הקטן (Ketubot 3:7, 27d). That order is alive in modern Hebrew too — לא ברור מה קרה, לא ידוע לי על כך, לא נראה לי.

הוא לא מבין למה כולם כועסים עליו.

hu lo mevín láma kulám ko'asím aláv

He doesn't understand why everyone is angry with him. (everyday speech and writing alike)

המשרד אינו אחראי לחפצים שנשכחו במקום.

hamisrád einó akhrái lakhafatsím shenishkekhú bamakóm

The office is not responsible for items left on the premises. (formal — a printed notice; spoken Hebrew says המשרד לא אחראי)

לא plus a second-person future is a prohibition, not a mistake. The Academy describes the negative command as always built on future forms, citing לֹא תִּרְצַח beside אַל תִּשְׁלַח. The two are not interchangeable in tone: אל plus the future is the everyday request, לא plus the future is the categorical ban — a rule, a sign, a parent who has finished discussing it. What אל cannot do is negate a statement. It is not a general "not"; it exists only to tell somebody not to do something, and it needs a second-person future behind it. A sentence about yourself takes לא however forcefully you mean it — אני לא רוצה לדבר על זה, never *אני אל רוצה.

לא תיכנסו לשם בלי קסדה, זה לא ויכוח.

lo tikansú leshám bli kasdá, ze lo vikúakh

You are not going in there without a helmet — this is not a discussion. (to a group, a flat prohibition)

אל תדאגי, אני אטפל בזה.

al tid'agí, aní atapél bazé

Don't worry, I'll take care of it. (to a woman — a request, so אל)

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One place לא genuinely cannot go is in front of יש. There is no *לא יש in Hebrew at all: existence and possession are denied by a separate word, אין. Which of the two a given sentence wants is decided on לא or אין.

Common Mistakes

1. Dropping the לא because English has already said "nobody". The single most frequent negation error at A1, and it comes from counting negatives the English way.

❌ אף אחד התקשר אליי כל היום

Incorrect — a clause with אף אחד still needs its לא, and the two do not cancel each other: אף אחד לא התקשר אליי כל היום. The same goes for כלום, שום דבר and אף פעם.

✅ אף אחד לא ידע מה קורה, אז חיכינו.

af ekhád lo yadá ma koré, az khikínu

Nobody knew what was going on, so we waited.

2. Spelling לא as לו. Both are pronounced lo, and writing by ear produces the wrong one.

❌ אני לו מבין את השאלה

Incorrect as a spelling of לא — the negator is written with an alef. לוֹ with a vav means 'to him', and the same two letters pointed לוּ are the elevated 'if only' of לוּ הָיִיתִי יוֹדֵעַ. Write אני לא מבין את השאלה.

✅ אני לא מבין את השאלה, אפשר לחזור עליה?

aní lo mevín et hashe'elá, efshár lakhazór aléha?

I don't understand the question — could you say it again? (m. speaker)

3. Leaving the verb in the present because English's "didn't" carried the tense. I didn't see puts the past in the auxiliary and leaves see bare. Hebrew has no auxiliary to put it in.

❌ אתמול אני לא רואה אותו בכלל

Incorrect — לא carries no tense whatsoever, so the verb itself has to be in the past: אתמול לא ראיתי אותו בכלל.

✅ אתמול לא ראיתי אותו בכלל, אולי הוא לא הגיע.

etmól lo ra'íti otó bikhlál, ulái hu lo higía

I didn't see him at all yesterday — maybe he never turned up.

Be aware of one licence, because you will hear it and think you have been misled. Israelis tell stories in the present, and once the story starts the whole thing stays there, past adverb and all: אתמול אני מגיע למשרד, ואני לא רואה אותו בכלל — so yesterday I get to the office, and he's nowhere to be seen. That is the same narrative present English uses in exactly the same way, and it is ordinary spoken Hebrew (informal). The ❌ above is wrong because it is not a narrative: it is one flat report of one finished event, with nothing before it to set the scene. What you may not do is land in the present by accident — if you did not choose to be telling the story that way, you are not allowed to be there.

Key Takeaways

לא is invariable. One form for every gender, number, person and tense. There is nothing to conjugate.
It stands immediately in front of what it negates, and moving it changes the meaning: אני לא הזמנתי versus לא אני הזמנתי.
No do-support anywhere. Didn't, doesn't and don't have no Hebrew counterpart; the tense stays inside the verb.
לא is also the bare answer no, the base of ממש לא and בכלל לא, and the universal tag question: אתה בא, לא?
It negates an infinitive directly: החלטנו לא לספר.
A clause with אף אחד, כלום, שום דבר, אף פעם keeps its לא. The negatives agree; they do not cancel.
הוא לא מבין is ordinary Hebrew, not a corruption of הוא אינו מבין — אינו is a preference for writing and formal speech. Put the predicate first and לא stops being merely tolerated: לא ברור מה קרה is what the Academy itself recommends.
לא plus the future is a categorical prohibition (לא תיכנסו); אל plus the future is the everyday request (אל תיכנסו). אל never negates a statement — only a person.
לא never stands in front of יש. Existence and possession are denied with אין.

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