By B1 you have met θα four or five times, each time under a different heading: the future, the continuous future, the conditional, the future perfect, probability. It is time to say the thing those pages could not say individually. θα has no meaning of its own. It is a single invariable particle that lifts a verb out of the plainly-asserted present, and the form standing behind it decides what you end up with. Learn the grid below and you no longer learn θα five times — you learn it once and read it off.
The whole of θα in one table
| Form behind θα | What you get | Example |
|---|---|---|
| perfective non-past — θα γράψω | simple future: one bounded act | Θα σου γράψω απόψε. |
| imperfective present — θα γράφω | continuous / habitual future; or inference about now | Θα γράφει ακόμα την αναφορά. |
| aorist — θα έγραψε | inference about a finished past event | Θα το έγραψε βιαστικά. |
| imperfect — θα έγραφα | conditional "would"; future-in-the-past; inference about a past state | Θα σου έγραφα, αλλά δεν είχα σήμα. |
| perfect — θα έχω γράψει | future perfect; or inference about now | Θα το έχει γράψει ήδη. |
| pluperfect — θα είχα γράψει | conditional "would have"; inference about then | Θα το είχε γράψει πριν φύγει. |
Six rows, one particle. Read down the middle column and you can see the logic: pointed at a non-past verb, θα gives a prediction; pointed at a past verb, it gives either a hypothesis or a guess — because a past form in Greek is also the language's marker of distance from reality. Nothing about θα itself changes between rows.
Θα περάσω να σε πάρω στις οκτώ.
tha peráso na se páro stis októ
I'll come by to pick you up at eight.
Όλο τον Αύγουστο θα δουλεύω από το σπίτι.
ólo ton Ávghusto tha dhulévo apó to spíti
All through August I'll be working from home.
Το φως είναι σβηστό — θα κοιμήθηκαν κιόλας.
to fos íne zvistó — tha kimíthikan kiólas
The light's off — they must have gone to sleep already.
Στη θέση σου θα το σκεφτόμουν λίγο ακόμα.
sti thési su tha to skeftómun lígho akóma
In your shoes I'd think about it a bit longer.
Μέχρι να γυρίσεις θα έχω στρώσει τα κρεβάτια.
méchri na yirísis tha écho strósi ta krevátia
By the time you get back I'll have made the beds.
Θα είχα φύγει νωρίτερα, αλλά κόλλησα στην κίνηση.
tha ícha fíyi norítera, alá kólisa stin kínisi
I'd have left earlier, but I got stuck in traffic.
Each of those rows has a page that works it out in detail: the simple future, the continuous future, probability and inference, the conditional and the future perfect. This page is the index and the syntax.
The strings that carry two readings
Because one particle covers so much ground, some θα-strings are genuinely ambiguous in isolation. This is not a flaw you can drill away; Greeks resolve it from the surrounding sentence, instantly and unconsciously. Three cases are worth memorising, together with what tips the balance.
| String | Reading A | Reading B | What decides |
|---|---|---|---|
| θα κοιμάται | "he'll be sleeping" (future) | "he must be asleep" (now) | a future time phrase → A; present evidence → B |
| θα ήταν | "it would be" (hypothesis) | "it must have been" (guess) | an αν-clause or στη θέση σου → A; evidence → B |
| θα ερχόταν | "he would come" (hypothesis) | "he was going to come" (future-in-the-past) | a reporting verb in front → B |
The third row deserves a word, because English speakers over-correct here. Greek does not force the backshift English forces. Μου είπε ότι θα ερχόταν and Μου είπε ότι θα έρθει are both ordinary Greek; the first views the promise from inside the past (and often hints it came to nothing), the second is what you say when the arrival is still ahead of you now. You are not obliged to move the tense back just because the reporting verb is past.
Είχαμε πει ότι θα τα λέγαμε μετά τις γιορτές.
íchame pi óti tha ta léghame metá tis yortés
We'd said we would talk after the holidays.
Μη χτυπάς, θα λείπει ακόμα στη δουλειά.
mi chtipás, tha lípi akóma sti dhuliá
Don't knock, he's probably still out at work.
θα is invariable, unstressed, and glued to its verb
Three formal facts, all of which learners trip over at least once:
It never inflects. There is no ×θας, no plural θα, no past θα. One shape for every person and tense.
It carries no stress, which is why it can be swallowed in fast speech. Before a vowel the verb's initial vowel is what drops, and an apostrophe marks the gap: θα 'ρθω, θα 'μαι, θα 'θελα. This is normal spoken Greek and standard in written dialogue, not sloppiness — the mechanism is aphaeresis.
Nothing may stand between θα and its verb except the weak object pronouns. Adverbs go in front of θα or after the verb, never in the middle: σίγουρα θα σου το πω, not ×θα σίγουρα σου το πω. The negator is likewise outside: δεν θα, in that order, matching English only in the contracted won't. The full preverbal queue is on clitic ordering.
Θα 'ρθω κατά τις εννιά, μη με περιμένετε για φαγητό.
tha 'rtho katá tis eniá, mi me periménete ya fayitó
I'll come around nine, don't wait for me to eat.
Δεν θα ξαναπάς εκεί μόνος σου, με άκουσες;
dhen tha ksanapás ekí mónos su, me ákuses;
You're not going back there on your own — do you hear me?
Where θα may stand, and where it may not
This is the part no single tense page can tell you, because it is about clauses rather than forms. θα is at home in a main clause and in some subordinate ones, and firmly barred from others.
θα is fine after ότι / πως (reported statements), after a relative pronoun, and after αν when αν means whether rather than if.
Νομίζω ότι θα αργήσουν λίγο, είχαν ραντεβού στο κέντρο.
nomízo óti tha aryísun lígho, íchan randevú sto kéndro
I think they'll be a bit late, they had an appointment in the centre.
Δεν ξέρω αν θα προλάβει να έρθει στα γενέθλια.
dhen kséro an tha prolávi na érthi sta yenéthlia
I don't know whether he'll manage to make it to the birthday.
θα stays out of the conditional αν-clause — the condition is bare and only the result carries θα (Αν έχω χρόνο, θα περάσω), a point argued on the conditional. It also stays out of future time clauses. After όταν and μόλις the verb is the bare dependent; after πριν it is bare or preceded by να; after μέχρι and ώσπου the να is obligatory. Either way there is no room left for θα, even though the event is plainly ahead — exactly as English says when I arrive, not when I will arrive.
αφού is the one to watch, because it is really two conjunctions. Temporal αφού ("after") behaves like όταν and takes the bare dependent: Αφού φάμε, θα βγούμε βόλτα. Causal αφού ("since, seeing as") heads an ordinary indicative clause and takes θα quite happily: Αφού θα πας ούτως ή άλλως, πάρε και τα δικά μου. The ban is on the time clause, not on the word.
Θα σου τηλεφωνήσω μόλις φτάσω στο ξενοδοχείο.
tha su tilefoníso mólis ftáso sto ksenodhochío
I'll ring you as soon as I get to the hotel.
And θα does not go inside a να-clause: a subjunctive clause already points forward, so Ελπίζω να προλάβουμε is "I hope we'll make it" with no future marker anywhere. That complementary distribution is the subject of να: all its uses.
The peremptory θα
There is a use of the plain future that textbooks skip and every Greek child knows. Said with the right intonation and from a position of authority, θα + verb is an order — not a prediction but a decision announced over your head. English does exactly the same with a stressed will: "You will sit down."
Θα κάτσεις φρόνιμα και θα με ακούσεις.
tha kátsis frónima ke tha me akúsis
You're going to sit still and you're going to listen to me.
This is (informal) and unmistakably top-down: a parent to a child, a coach to a team. Used sideways — to a colleague, to a stranger — it is rude, so recognise it long before you produce it. It also explains why a negative Δεν θα… so often lands as a prohibition rather than a forecast.
θα in fixed phrases
A handful of θα-strings have hardened into set expressions whose meaning you cannot compute from the parts.
- Θα δούμε — "we'll see", the standard non-committal answer.
- Θα μου πεις… (informal) — a discourse move meaning roughly "you'll object that…", used to raise the counter-argument yourself before someone else does.
- Καλά θα κάνεις να… — "you'd better…", firm advice with a hint of warning.
- Δεν θα 'λεγα — "I wouldn't say so", a soft disagreement.
Θα δούμε, δεν το έχουμε αποφασίσει ακόμα.
tha dhúme, dhen to échume apofasísi akóma
We'll see — we haven't decided yet.
Θα μου πεις, ποιος τους ζήτησε τη γνώμη τους;
tha mu pis, pios tus zítise ti ghnómi tus;
You'll say — who asked them for their opinion anyway?
Καλά θα κάνεις να το σκεφτείς άλλη μια φορά.
kalá tha kánis na to skeftís áli mia forá
You'd do well to think it over one more time.
Common Mistakes
1. Using θα for English's habitual would. We would spend two weeks on the island every summer is not a hypothesis and not a future — it is a plain past habit, and Greek expresses it with the bare imperfect. Adding θα turns the memory into a conditional.
❌ Κάθε καλοκαίρι θα περνούσαμε δυο βδομάδες στο νησί.
Incorrect for a past habit — the habitual 'would' is the bare imperfect: Κάθε καλοκαίρι περνούσαμε.
✅ Κάθε καλοκαίρι περνούσαμε δυο βδομάδες στο νησί.
káthe kalokéri pernúsame dhio vdhomádhes sto nisí
Every summer we would spend a fortnight on the island.
2. Guessing about the past with a future form. The guess and the event have to line up in time: if the situation is over, the verb behind θα must be a past one. A non-past verb pushes the whole sentence into the future and contradicts the evidence you just gave.
❌ Θα φύγει ήδη, το γραφείο της είναι άδειο.
Incorrect — an inference about something already over takes a past verb: Θα έφυγε ήδη.
✅ Θα έφυγε ήδη, το γραφείο της είναι άδειο.
tha éfiye ídhi, to ghrafío tis íne ádhio
She must have left already — her office is empty.
3. Marking the future twice. In a when / as soon as clause the futurity is already carried by the main verb, and the time clause takes the bare dependent.
❌ Θα σε πάρω τηλέφωνο όταν θα φτάσω στο σπίτι.
Incorrect — a future time clause takes the bare dependent: όταν φτάσω.
✅ Θα σε πάρω τηλέφωνο όταν φτάσω στο σπίτι.
tha se páro tiléfono ótan ftáso sto spíti
I'll call you when I get home.
Key Takeaways
- θα has no meaning of its own: it marks the verb as not plainly asserted, and the form behind it supplies the reading.
- Non-past behind θα → a future; past behind θα → a hypothesis or a guess. That is the whole grid in one line.
- Some strings carry two readings — θα κοιμάται, θα ήταν, θα ερχόταν — and only the frame around them decides. Greek tolerates this because the frame is always there.
- θα is invariable and unstressed, elides into the verb (θα 'ρθω), and admits nothing between itself and the verb except weak pronouns; the negator sits outside: δεν θα.
- θα is fine after ότι/πως, in relative clauses and after αν meaning whether — but stays out of conditional αν-clauses, future time clauses (όταν φτάσω) and να-clauses.
- The plain future doubles as a peremptory order (informal, top-down) — Θα κάτσεις φρόνιμα — and lives on in set phrases like Θα δούμε and Καλά θα κάνεις να….
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Start learning Greek →Related Topics
- The Future With θαA2 — Greek builds its entire future out of one tiny, unchanging particle — θα — set in front of a finite verb: θα γράψω, θα πάω, θα σε δω. This hub explains where θα sits, how it negates, why the verb behind it decides whether the future is simple or continuous, and how the same particle later builds the conditional and expresses probability.
- The Conditional With θαB1 — Greek has no conditional endings — it builds would out of the future particle θα plus a past tense: θα έγραφα (I would write) and θα είχα γράψει (I would have written). Why a past tense is what marks unreality, how the two halves of an αν-sentence pair up, and the third job of the same shape, the future-in-the-past of Μου είπε ότι θα ερχόταν.
- θα for Probability and InferenceB2 — θα is not only the future particle: put in front of a present or past verb it expresses the speaker's inference — 'he must be', 'she'll probably', 'it must have been'. Θα είναι στο σπίτι means 'he's probably home', Θα το ξέχασε means 'he must have forgotten it'. Here θα has nothing to do with future time; it marks a confident guess.
- The Particles θα, να, ας, μη(ν)A2 — Four one-syllable words carry everything Greek does not do with endings: θα for the future and the conditional, να for the subjunctive, ας for 'let's', μη(ν) for prohibition. How they line up in a fixed preverbal chain, why each one picks its own negator, and why every one of them needs an aspect-marked verb behind it.
- 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.
- The Future Perfect (θα έχω γράψει)B2 — Put θα in front of the present perfect and it projects into the future: θα έχω γράψει is 'I will have written', an action to be finished by some future point — Μέχρι τις πέντε θα έχω τελειώσει ('By five I'll have finished'). The very same form also does double duty as a confident inference about the present: θα έχει φύγει, 'he'll have left by now'.