συμμετέχω is the institutional “participate”: it belongs naturally to conferences, competitions, elections, surveys, and programmes. In ordinary conversation, παίρνω μέρος is often lighter. The verb's real challenge is its split stem: συμμετέχ- becomes συμμετάσχ- in perfective contexts.
Συμμετέχω στον διαγωνισμό με την ομάδα μου.
simetécho ston dhiaghonizmó me tin omádha mu
I'm taking part in the competition with my team.
Παίρνω μέρος στον διαγωνισμό με την ομάδα μου.
pérno méros ston dhiaghonizmó me tin omádha mu
I'm taking part in the competition with my team. (informal)
Principal parts
| Slot | Form | Status |
|---|---|---|
| Present | συμμετέχω, συμμετέχεις, συμμετέχει, συμμετέχουμε, συμμετέχετε, συμμετέχουν | imperfective stem |
| Past | συμμετείχα | ordinary past, whatever the event's aspect |
| Perfective dependent | να / θα συμμετάσχω | suppletive learned stem |
| Perfect | έχω συμμετάσχει | |
| Imperative | συμμετάσχετε | live in plural or polite institutional calls to action; the singular is normally avoided |
| Ancient-type aorist | συμμετέσχε | third-person singular only; (formal), historical prose |
| Mediopassive / -μένος participle | Does not exist: no standard συμμετέχομαι or συμμετεχόμενος | |
English keeps participate unchanged across “participated” and “will participate.” Greek inherited two historical stems, related to έχω and σχ-, so there is no productive rule that derives one from the other. συμμετείχα is morphologically an imperfect, but current usage also employs it for a completed past participation instead of maintaining a neat imperfect–aorist pair.
The present stem still matters whenever participation is viewed as ongoing or repeated: θα συμμετέχω κάθε εβδομάδα. The perfective stem presents entry into one bounded event: θα συμμετάσχω αύριο. This is a regular aspect opposition in function even though its two shapes are suppletive. The wider pattern is mapped on irregular perfective stems and suppletive verbs.
Πέρσι συμμετείχα σε ένα πρόγραμμα ανταλλαγής.
pérsi simetícha se éna próghrama andalaghís
Last year I took part in an exchange programme.
Θέλω να συμμετάσχω στην επόμενη συνάντηση.
thélo na simetáscho stin epómeni sinándisi
I want to take part in the next meeting.
Η χώρα συμμετέσχε στην αποστολή ως παρατηρητής.
i chóra simetésche stin apostolí os paratiritís
The country took part in the mission as an observer. (formal)
The brief's tempting claim that there is no imperative is too broad: plural or polite συμμετάσχετε is alive in institutional invitations. A familiar singular command is normally recast instead.
Συμμετάσχετε στην έρευνα μέχρι την Παρασκευή.
simetáschete stin érevna méchri tin Paraskeví
Take part in the survey by Friday. (formal)
The learned aorist is different from that current imperative. Attested συμμετέσχε reports a historical event in third-person singular formal prose; it is not the first cell of a usable six-person past paradigm. In contemporary narration, even a completed event normally takes συμμετείχα. This is one of the rare places where morphological label and everyday aspectual work no longer align neatly.
Government
The activity follows σε + accusative, never as a bare object: σε έρευνα, στον αγώνα, στις εκλογές. A contribution can additionally use με for the means or amount.
Συμμετέχουν στις διαπραγματεύσεις με δύο εκπροσώπους.
simetéchun stis dhiapraghmatéfsis me dhío eksoprosópus
They are participating in the negotiations with two representatives.
Set phrases
δηλώνω συμμετοχή “register to participate”; η συμμετοχή είναι δωρεάν “participation is free”; ποσοστό συμμετοχής “turnout/participation rate”; παίρνω μέρος “take part” (informal); οι συμμετέχοντες “the participants.” The last is a learned -ων participle turned into an everyday institutional noun.
Οι συμμετέχοντες θα λάβουν το πρόγραμμα με ηλεκτρονικό ταχυδρομείο.
i simetéchondes tha lávun to próghrama me ilektronikó tachidhromío
Participants will receive the programme by email.
Η συμμετοχή είναι δωρεάν, αλλά χρειάζεται εγγραφή.
i simetochí íne dhoreán, alá chriázete enghrafí
Participation is free, but registration is required.
Common Mistakes
❌ Συμμετέχω τον διαγωνισμό του σχολείου.
Incorrect — συμμετέχω requires σε before the activity.
✅ Συμμετέχω στον διαγωνισμό του σχολείου.
simetécho ston dhiaghonizmó tu scholíu
I'm taking part in the school competition.
Key Takeaways
- συμμετέχω · συμμετείχα · συμμετάσχω · έχω συμμετάσχει; the stems must be learned together.
- Historical third-person συμμετέσχε is (formal); plural or polite imperative συμμετάσχετε is genuinely current.
- The frame is always συμμετέχω σε + accusative; everyday παίρνω μέρος is less institutional.
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