Learn Hardcore Greek: Χτες το βράδυ ήμουν τόσο κουρασμένος που κοιμήθηκα νωρίς. - Last night I was so tired that I went to sleep early.

χτες: very common in everyday writing and speech (simplified spelling).
χθες: also common; slightly more “standard/orthographic” looking because it keeps the historical χθ.
εχθές: more formal/literary; less common in casual contexts. Pronunciation is essentially the same for most speakers.

What does το βράδυ literally mean, and why is there το?

βράδυ means evening/night (as a time period), and το is the neuter singular definite article (the). Greek often uses the article in time expressions where English might omit it:

το βράδυ = in the evening / at night You’ll also see this pattern with times: το πρωί (in the morning), το μεσημέρι (at noon), etc.

Why is the word order Χτες το βράδυ and not something like “I was…” first?

Greek word order is flexible. Putting Χτες το βράδυ first sets the time frame upfront (topic/focus). You could also say:

Ήμουν χτες το βράδυ τόσο κουρασμένος που… Both are correct; the original just foregrounds when it happened.

Why is ήμουν (imperfect) used instead of an aorist form of είμαι?

Greek uses the imperfect (ήμουν) for an ongoing state/background in the past: “I was (in a state of being tired).”
Then it uses the aorist (κοιμήθηκα) for the completed event that happened as a result. This is a very common pairing: background state (imperfect) + main event (aorist).

What’s the grammar of τόσο … που?

τόσο … που is a cause-result structure meaning so … that:

τόσο κουρασμένος = so tired
που κοιμήθηκα νωρίς = that I fell asleep early Greek commonly uses που here (not ώστε in this sentence). ώστε can appear in similar result clauses, often with a slightly more formal/explicit “as a result” feel.

Why is κουρασμένος masculine? What if the speaker is female?

Adjectives agree with the speaker (or the person described) in gender and number.

Masculine: κουρασμένος
Feminine: κουρασμένη
Neuter (for “it”/a thing): κουρασμένο So a woman would say: Χτες το βράδυ ήμουν τόσο κουρασμένη που κοιμήθηκα νωρίς.

Why isn’t εγώ (I) included? Is it optional?

Yes. Greek is a “pro-drop” language: the subject pronoun is usually omitted because the verb ending shows the person.

ήμουν already means I was You’d add εγώ mainly for emphasis or contrast, like “I (not someone else) was…”

What tense/voice is κοιμήθηκα? Why does it look “passive”?

κοιμήθηκα is aorist, 1st person singular, in the mediopassive form. With many verbs, Greek uses mediopassive endings for actions that happen to/for oneself or for intransitive “change-of-state” events.
In practice, κοιμήθηκα commonly means I fell asleep / I slept (depending on context). It’s not “passive” in meaning here.

Can I also say κοιμήθηκα = “I went to sleep”? How is that different from πήγα για ύπνο?

Yes, κοιμήθηκα often corresponds to I fell asleep / I went to sleep (focus on the moment sleep happened).
πήγα για ύπνο means I went to bed (to sleep)—it focuses more on the action of going to bed, not necessarily the moment you actually fell asleep.

What does νωρίς exactly mean here—“early” compared to what?

νωρίς means early in the sense of earlier than usual/expected. In this sentence it typically means the speaker fell asleep earlier than their normal bedtime.

How do I pronounce some tricky parts (like χ, βράδυ, ήμουν)?

A few key pronunciation points:

χ: like the German Bach / Scottish loch (a throaty fricative). Before e/i it’s “lighter” (more like German ich for many speakers).
β: pronounced v (so βράδυ starts with v).
ήμουν: stress on the first syllable: Í-moon (approx.), with Greek ου = oo as in food.

Why are the accents important in Χτες, βράδυ, ήμουν, τόσο, κουρασμένος, κοιμήθηκα, νωρίς?

Accent marks show the stressed syllable, and stress can affect meaning and correctness. For example:

τοσο is incorrect spelling; it must be τόσο
κοιμηθηκα without accents is often seen in all-caps or informal typing, but standard spelling is κοιμήθηκα Learning the accents helps you pronounce words correctly and recognize forms.