Latin built its future and its subjunctive out of endings, and Spanish and French inherited them. Greek threw the endings away and rebuilt the whole system out of four little words placed in front of the verb: θα, να, ας and μη(ν). You have already met them one at a time — in the future, in the subjunctive, in commands. This page puts them side by side, because they are not four unrelated words: they are one system with one shared syntax, and seeing it whole is what turns a pile of rules into something you can predict.
The four at a glance
| Particle | What it marks | Its negator | Example |
|---|---|---|---|
| θα | future, conditional, confident guess | δεν | θα φύγω — "I'll leave" |
| να | subjunctive: wish, purpose, complement | μη(ν) | να φύγω — "(that) I leave / to leave" |
| ας | hortative: "let's / let him" | μη(ν) | ας φύγω — "let me leave" |
| μη(ν) | prohibition, warning | — | μη φύγεις — "don't leave" |
Two things about that table are worth pausing on. First, none of these words inflects: θα is θα for every person, tense and number, and so are the others. Second, none of them is stressed — they lean on the verb behind them and never carry a tonos of their own. The one apparent exception, the pointing νά of Νά τος! ("There he is!"), is a genuinely different word that happens to be spelled the same; it is dealt with on standalone να.
One chain in front of the verb
Everything that can precede a Greek verb does so in a fixed order, and the particles occupy the front of that queue:
[να / ας] → [δεν / μη(ν)] → [θα] → [genitive clitic] → [accusative clitic] → VERB
Read those first three slots as positions, not as a menu: they are paired, and only two fillings of them exist. An indicative clause takes δεν in the negator slot and may use the θα slot — δεν θα σου το ξαναπώ. A subjunctive clause takes να or ας in the first slot, μη(ν) in the negator slot, and leaves the θα slot empty for good — να μην του το πεις. Crosswise strings like ×μην θα and ×να δεν do not occur.
Nothing else may squeeze in. No adverb, no subject noun, no "please" — only the weak object pronouns come between a particle and its verb. The full template, including the pronoun slots, belongs to clitic ordering; what matters here is the shape.
Δεν θα τους το πούμε ακόμα, θέλουμε να είμαστε σίγουροι.
dhen tha tus to púme akóma, thélume na ímaste síghuri
We won't tell them yet, we want to be sure.
Να μη μου το θυμίζεις, στενοχωριέμαι.
na mi mu to thimízis, stenochoriéme
Don't remind me about it, it upsets me.
Ας τους αφήσουμε να τελειώσουν και μετά μιλάμε.
as tus afísume na teliósun ke metá miláme
Let's let them finish, and then we'll talk.
The reason those two fillings are the only ones is that a clause is either indicative or subjunctive and cannot be both. θα is the indicative's marker, να and ας the subjunctive's, so they never share a clause in either order — neither ×θα να nor ×να θα. That is also why a να-clause needs no future marker: Ελπίζω να τα πούμε αύριο already points forward on its own.
Every particle takes an aspect-marked verb
Here is the part that catches learners who think of these particles as translations of English will, to, let and don't. English glues those words onto a single invariable verb form: will go, to go, let him go, don't go. Greek has no such form. Behind every particle there is a live, conjugated verb, and it comes in two shapes — the imperfective (present) stem and the perfective one — so you must choose an aspect every single time.
| Particle |
|
|
|---|---|---|
| θα | θα γράφω — "I'll be writing / I'll write regularly" | θα γράψω — "I'll write it" |
| να | να γράφεις — "(that) you write, keep writing" | να γράψεις — "(that) you write it once" |
| ας | ας γράφει — "let him carry on writing" | ας γράψει — "let him write it" |
| μη(ν) | μη γράφεις — "don't write / stop writing" | μη γράψεις — "don't write it" |
That grid is the honest shape of the system: four particles times two stems, and the two dimensions are independent. The particle tells you what kind of statement you are making; the stem tells you how the action is packaged. Neither choice can be skipped.
Θα σου φέρω τα κλειδιά αύριο το πρωί.
tha su féro ta klidhiá ávrio to proí
I'll bring you the keys tomorrow morning.
Να μου γράφεις πού και πού, μη χανόμαστε τελείως.
na mu ghráfis pu ke pu, mi chanómaste telíos
Write to me now and then, let's not lose touch completely.
One consequence is worth stating flatly: the perfective form γράψω is not a word you can use on its own. It exists only leaning on one of these particles (or on a past augment, or in the imperative). Greek grammarians call it the εξαρτημένη, the dependent — a form that is grammatically incomplete until a particle props it up. This is spelled out on the two stems.
The particle chooses the negator
English has one negator for everything: not. Greek has two, and which one you use is decided by the particle in front of the verb, not by the meaning of "not". This single fact resolves most of the δεν/μην confusion learners suffer through.
- θα belongs to the indicative — to statements about what is, was or will be. The indicative negator is δεν: δεν θα.
- να and ας belong to the subjunctive — to what is wished for, aimed at, or urged. Their negator is μη(ν): να μην, ας μην.
- A command takes μη(ν) too, and the verb switches to the dependent form: μην ανοίξεις.
Δεν θα προλάβω να περάσω από το σούπερ μάρκετ.
dhen tha prolávo na peráso apó to súper márket
I won't have time to stop by the supermarket.
Πες του να μη μας περιμένει, θα αργήσουμε πολύ.
pes tu na mi mas periméni, tha aryísume polí
Tell him not to wait for us, we'll be very late.
Ας μην το συζητήσουμε τώρα, είναι όλοι κουρασμένοι.
as min to sizitísume tóra, íne óli kurazméni
Let's not discuss it now, everyone's tired.
Note the two negators also behave differently in the mouth. μη(ν) genuinely drops its ν: μην before a vowel or a stop (μην ανοίξεις, μην το πεις), μη everywhere else (μη φεύγεις, μη μας περιμένει). δεν, by contrast, is normally written and said with its ν whatever follows. The details are on the final ν, and the δεν/μην split gets a page of its own at δεν vs μη(ν).
θα or να? The choice you make every day
For an English speaker the daily decision is between θα and να, because English blurs them. Shall I open the window? and Will I open the window? look like the same grammar; in Greek they are two different particles, because they are two different acts. θα predicts; να puts something on the table without claiming it will happen.
Να σου φέρω κάτι από το φούρνο;
na su féro káti apó to fúrno;
Shall I get you something from the bakery?
Θα περάσω από το φούρνο γυρίζοντας, μη σε νοιάζει.
tha peráso apó to fúrno yirízondas, mi se niázi
I'll stop by the bakery on the way back, don't worry about it.
Both are perfectly good Greek and both are about the same errand. The first offers, the second commits. Choose the particle by what you are doing with the sentence, not by the English tense.
μη(ν) does more than say "not"
μη(ν) is usually taught purely as the negative half of a pair, but it also heads clauses of its own after verbs of watching out and worrying — the "lest" of older English, and the everyday Greek way of saying careful you don't… or I'm afraid it might…. There is no να in these; μη(ν) is doing the subordinating itself.
Πρόσεχε μην κρυώσεις, έχει αέρα έξω.
próseche min kriósis, échi aéra ékso
Careful you don't catch a chill, it's windy out.
Φοβάμαι μη χαλάσει ο καιρός το σαββατοκύριακο.
fováme mi chalási o kerós to savatokíriako
I'm afraid the weather might turn at the weekend.
The fuller, slightly more careful variant of this μη(ν) is μήπως — Φοβάμαι μήπως ξέχασα τα φώτα αναμμένα. Both belong to ordinary spoken Greek; μήπως simply sounds a shade more deliberate.
Where each one is taught in full
This page is the map; each particle has its own territory. θα across the future, the conditional and inference is gathered on θα: all its uses. να in all its environments is on να: all its uses. ας lives on the particle ας and, from the command side, on first-person commands. μη(ν) as a prohibition is on negative commands with μη(ν). The three moods that these particles serve are laid out on moods.
Common Mistakes
1. Negating θα with μη(ν). This is the sharpest test of the rule above, and worth running on yourself before you ever produce it: μη(ν) looks like the all-purpose "modal" negator, and θα looks modal. But θα builds indicative sentences, and the indicative negator is δεν — no context anywhere licenses μη(ν) in front of θα.
❌ Μην θα σε ενοχλήσω άλλο με τα μηνύματα.
Incorrect — a θα-clause is negated with δεν: Δεν θα σε ενοχλήσω.
✅ Δεν θα σε ενοχλήσω άλλο με τα μηνύματα.
dhen tha se enochlíso álo me ta minímata
I won't bother you with messages anymore.
2. Putting the negator before να. English says not to be late, with the negative first, and the order transfers. In Greek the mood particle heads the clause and the negator follows it.
❌ Μην να αργήσεις πάλι το πρωί.
Incorrect order — να comes first and μην follows: Να μην αργήσεις.
✅ Να μην αργήσεις πάλι το πρωί.
na min aryísis páli to proí
Don't be late again in the morning.
3. Using ας inside a complement clause. ας heads its own clause — it urges, it does not link. When one verb hangs off another (θέλω, πρέπει, μπορώ), the linker is να.
❌ Θέλω ας πάμε κάπου αλλού για φαγητό.
Incorrect — a complement of θέλω takes να: Θέλω να πάμε.
✅ Θέλω να πάμε κάπου αλλού για φαγητό.
thélo na páme kápu alú ya fayitó
I want us to go somewhere else to eat.
4. Using δεν or μη(ν) with no verb. Both are verb particles: they need a verb immediately to their right. To negate a bare noun, pronoun or phrase, Greek uses όχι.
❌ Δεν εγώ, ο αδερφός μου το έσπασε.
Incorrect — with no verb to attach to, the negator is όχι: Όχι εγώ.
✅ Όχι εγώ, ο αδερφός μου το έσπασε.
óchi eghó, o adherfós mu to éspase
Not me — my brother broke it.
Key Takeaways
- Greek replaced the future and subjunctive endings of its ancestors with four invariable, unstressed particles: θα, να, ας, μη(ν).
- They form a fixed chain in front of the verb — [να/ας] [δεν/μη(ν)] [θα] [clitics] VERB — and only weak pronouns may stand between a particle and its verb.
- θα never shares a clause with να or ας: a clause is either indicative or subjunctive, so a να-clause needs no future marker.
- Every particle takes an aspect-marked verb: θα γράφω / θα γράψω, να γράφεις / να γράψεις, μη γράφεις / μη γράψεις. The perfective form cannot stand without one.
- The particle picks the negator: δεν goes with θα and the plain indicative; μη(ν) goes with να, ας and commands — and only μη(ν) drops its ν (μη φεύγεις, μην ανοίξεις).
- μη(ν) also heads warning clauses after πρόσεχε and φοβάμαι, where English has no negative at all: Φοβάμαι μη βρέξει.
Now practice Greek
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Greek →Related Topics
- θα: All Its UsesB1 — One invariable particle with no meaning of its own: the form behind θα decides whether you get a future, a conditional, a future-in-the-past or a confident guess. The complete grid of θα + every tense, the strings that carry two readings and what tells them apart, where θα may and may not stand in a subordinate clause, and the peremptory θα that functions as an order.
- να: All Its UsesB1 — The busiest word in Greek, gathered into one reference: every environment να appears in, the single property that unites them — a να-clause is never asserted — and the constructions the frame pages miss, from Τον είδα να φεύγει to σαν να and Δεν έχω τι να φορέσω.
- Moods: Indicative, Subjunctive, ImperativeA2 — Greek's three moods — the fact-stating indicative, the all-purpose να-subjunctive that replaces the missing infinitive, and the imperative for commands — plus the particle family θα, να and ας that drives them.
- The Two Verb StemsA2 — Aspect is an idea; the two stems are where it becomes forms. Every Greek verb has an imperfective stem (present, imperfect, continuous future/subjunctive) and a perfective stem (aorist, simple future/subjunctive/imperative). This page shows how the perfective stem is built — γράφω → γράψ-, αγαπώ → αγαπήσ-, παίζω → παίξ- — and which forms draw on which.
- Clitic Ordering and ContractionB2 — The full pre-verbal template — subordinator, then δεν/μην, then θα, then the genitive clitic, then the accusative clitic, then the verb — plus the morphophonemics that fall out of it: why μη μου το λες loses its ν but μην το κάνεις keeps it, why μου την έδωσε keeps a ν that μου τη ζήτησε drops, and the spoken contractions στο, στα and μου 'πε.