Subject-Verb Agreement — I can choose verb forms that match the subject in common high-frequency sentence frames at my level.

The Greek language has been encoding who does what directly into the verb for thousands of years. Unlike English, where we rely heavily on separate pronoun words (I run, you run, she runs), Greek verb endings carry all the information about the subject right inside the verb itself. This system of subject-verb agreement (called συμφωνία υποκειμένου-ρήματος in Greek) has been a core feature of the language from Ancient Greek through Modern Greek today. Understanding this history helps us see why verb endings matter so much in everyday conversation.

The key question this lesson addresses is straightforward: when you build a Greek sentence, how do you pick the correct verb ending so your listener instantly knows who is performing the action? Getting this right is the difference between sounding natural and sounding confused. Let's break down the system step by step.

Greek subject-verb agreement follows a clean, logical system built on two axes: person (who is speaking or being spoken about) and number (how many people are involved). Every Greek verb in the present tense has six distinct forms created by combining three persons with two numbers. Once you internalize these core principles, agreement becomes almost automatic.

The following diagram maps out how the verb γράφω (to write), a Group A verb, changes its ending across all six person-number combinations. Notice how the stem γράφ- stays constant while the ending shifts to encode the subject.

As the diagram shows, the endings follow a predictable pattern. The first person singular ending -ω is the form you find in the dictionary — this is your base form. Second person gets -εις for singular and -ετε for plural. Third person takes -ει for singular and -ουν(ε) for plural. Once you memorize these six endings for Group A, you can conjugate hundreds of verbs.

Choosing the right verb form in Greek is a three-step decision process. You need to identify the subject, determine whether it is singular or plural, and then attach the correct ending to the verb stem. Let's formalize this process so you can apply it to any sentence you want to build.

Step-by-Step Decision Process

The critical piece is distinguishing between the two conjugation groups. Group A verbs are stressed on the second-to-last syllable in the first person singular (e.g., γράφω, διαβάζω), while Group B verbs are stressed on the last syllable (e.g., μιλώ, αγαπώ). The endings differ slightly between these groups.

Now that you know the endings, let's see how they work inside real sentence patterns you'll use every day. The following high-frequency sentence frames are the building blocks of conversational Greek. Each frame shows you a common structure where subject-verb agreement is essential for clear communication.

Notice something important in Frame 3. When you use θέλω + να + verb (I want to + verb), both verbs must agree with the same subject. So "we want to eat" becomes θέλουμε να φάμε — both verbs carry first person plural endings. This double agreement is a common stumbling point for learners, so keep an eye on it.

Let's walk through the process of constructing a Greek sentence with proper subject-verb agreement from scratch. We'll take the English sentence "They speak Greek at home" and produce the correct Greek version step by step.

Even after learning the endings, learners of Greek commonly make certain agreement mistakes. Recognizing these pitfalls in advance can save you a lot of frustration. The table below lists the most frequent errors, explains why they happen, and shows the correct form.

The present-tense agreement system you've just learned is the foundation for every other tense in Greek. The good news is that the same person-number logic applies across the board — what changes is the stem or the specific set of endings, not the underlying principle of matching the verb to the subject. Below is a preview of how agreement works in other tenses so you can see the pattern extend.

As you progress, you'll discover that mastering the present tense endings gives you a framework for every tense. The past tense uses a slightly different set of endings (-α, -ες, -ε, -αμε, -ατε, -αν), but the same three-person, two-number grid applies. Similarly, the future and subjunctive use present-type endings on a different stem. Your investment in learning agreement now will pay dividends in every future tense you study.

Test your understanding of Greek subject-verb agreement with these five problems. They progress from basic recall to more challenging analysis. Try to answer each one before checking the solution.