Past Conditional (θα είχα γράψει)

θα είχα γράψει is "I would have written" — the tense of everything that did not happen, and of everything you wish had happened differently. You met the form on the pluperfect, where it appears as the pluperfect's second job; this page is the system behind it: every shape a past-unreal sentence can take, which verbs cannot take some of them, and what Greeks actually say instead when they are not being careful.

Form: θα + είχα + the invariable -ει word

Three pieces in fixed order. θα never changes, είχα carries the person, and the -ει form is frozen for ever.

Negation and weak pronouns pile up in front, in the order δεν → θα → clitic(s) → είχα → -ει form: δεν θα το είχα κάνει. That order is the property of the whole perfect family and is worked out on the pluperfect and the future perfect.

The four shapes of a past-unreal sentence

Here is the paradigm in full. All four are correct Greek; they differ in what kind of condition you are describing and in how careful the register is.

The second row deserves emphasis, because textbooks tend to teach only the first. A past state — knowing, being, being able, wanting — sits naturally in the imperfect, and pairing it with a pluperfect result is not sloppy; it is the normal thing to say.

When the mixed pair is the only option

Some very common verbs have no perfect at all, and that quietly removes rows from the table above.

• ξέρω has no productive perfective stem, so there is no -ει form to put after είχα. "If I had known" can only be αν το ήξερα.
• είμαι has no perfect either: there is no -ει form to build one from, so ×έχω είναι and ×είχα είναι are equally impossible. "It would have been nicer" is θα ήταν πιο ωραία, with an imperfect doing the work of English would have been.
• έχω as a main verb behaves the same way: "I would have had more time" is θα είχα περισσότερο χρόνο.

This is not an exception you have to memorise as a list of oddities — it follows from the aspect system, since a verb with no perfective stem has nothing to build a perfect out of. But it does mean that a perfectly ordinary sentence can end up with an imperfect on both sides and still be a past counterfactual.

Regret, reproach, and the near miss

The result clause stands perfectly well on its own, with the condition left unsaid. This is how Greek expresses regret about your own past and reproach about someone else's — and the reproach version is noticeably gentler than a flat accusation, because the conditional refuses to state anything as fact.

αλλιώς and διαφορετικά ("otherwise") are the workhorses of the unspoken condition: they point back at what actually happened and build the counterfactual out of its opposite. Λίγο ακόμα και… is the near-miss frame, the Greek "another minute and…".

θα έπρεπε να είχα, θα μπορούσα να είχα

English says should have and could have with a modal. Greek stacks its modal in front of a pluperfect: θα έπρεπε να είχες… ("you should have…"), θα μπορούσα να είχα… ("I could have…"). The modal itself is a conditional, the να-clause carries the pluperfect, and the result is the standard way to say that a past choice was the wrong one.

The versions without θα — έπρεπε να το είχες πει, μπορούσα να είχα πάει — are equally correct and are covered on impersonal πρέπει / μπορεί να. The θα simply adds a layer of hedging: έπρεπε delivers the reproach straight, θα έπρεπε delivers it wrapped in a conditional and lands softer. Choose by how much you want to sting.

Two readings of θα είχε

The same three words carry a completely different meaning in a different frame. θα είχε φύγει is "he would have left" (counterfactual) and "he must have left by then" (inference) — the epistemic use that the future perfect owns. Nothing in the form separates them; the frame does. An αν-clause, an αλλιώς, a "in your place" pulls it to would have. A piece of evidence you are reasoning from pulls it to must have.

Register: what people actually say

Here is the honest usage note. In careful speech and in writing, the full θα είχα is alive and precise. In relaxed conversation, though, Greeks very often flatten it to θα + imperfect, letting one form cover both the present and the past counterfactual. Αν το ήξερα, θα σου το έλεγα can mean "if I knew, I'd tell you" or "if I had known, I'd have told you", and the context sorts it out.

This is a register fact, not an error: neither version is more correct than the other. Produce the full θα είχα when the two-past sequence matters or when you are writing; recognise the flattened one everywhere, because it is what you will mostly hear.

Common Mistakes

1. Using the aorist in the αν-clause. English "if I had paid attention" contains a past, and the aorist is the first past that comes to hand. But αν + aorist states an open condition about the past ("if I actually did…"), which clashes with a counterfactual result.

2. Building a pluperfect out of ξέρω. There is no -ει form for this verb, so the pluperfect route is simply closed and the imperfect ήξερα does the job. The full list of slots ξέρω leaves empty is worth a look, because this is not the only tense it cannot build.

3. Leaving the auxiliary in the present. θα έχω + -ει is the future perfect ("will have done"); a counterfactual about the past needs the past auxiliary είχα.

4. Mismatching the two persons in the modal stack. With μπορώ the person is marked twice — on the modal and on είχα — and the two must be the same.

Key Takeaways

• θα + είχα + the -ει form = "would have done"; θα is frozen, είχα carries the person, the -ει word never changes.
• A past-unreal sentence has four legal shapes, differing in whether each half is a pluperfect or an imperfect; all four are correct Greek.
• A condition that is a state (ήξερα, ήμουν, μπορούσα) goes in the imperfect even when the result is a pluperfect — this mixed pair is normal, not sloppy.
• ξέρω, είμαι and έχω have no perfect, so wherever one of them is the verb, the imperfect does the job by itself: Αν το ήξερα…, θα ήταν πιο ωραία.
• On its own it expresses regret and reproach, often with αλλιώς / διαφορετικά ("otherwise") or Λίγο ακόμα και… ("another minute and…").
• θα έπρεπε να είχες… / θα μπορούσα να είχα… are Greek's "should have / could have"; the θα-less versions say the same thing more bluntly.
• θα είχε is also the inference "he must have done it" — the frame, not the form, tells the two apart.
• Register: in conversation θα είχα is often flattened to θα + imperfect, which covers present and past counterfactuals alike — a register choice, not an error; neither version is more correct.