Καληνύχτα, θα συνεχίσουμε αύριο, γιατί είμαι πολύ κουρασμένος.

Καληνύχτα is a fixed expression meaning good night. It comes historically from καλή νύχτα (good night), but in modern everyday Greek it is very commonly written as one word when used as a greeting or farewell.

You may still also see καλή νύχτα in some contexts, especially when the phrase is felt more literally, but καληνύχτα is extremely common as the set expression.

Θα is the particle used to form the future in Modern Greek. So:

• συνεχίζουμε = we continue / we are continuing
• θα συνεχίσουμε = we will continue

Unlike English, Greek does not usually use a separate verb like will. Instead, it uses θα plus the verb form.

After θα, Greek often uses a form based on the perfective stem when talking about a single complete future action.

So:

• θα συνεχίσουμε = we will continue
• συνεχίζουμε by itself usually means we continue / we are continuing

This is part of an important Greek pattern: many verbs have an imperfective form and a perfective form. English speakers often notice this because English does not mark this distinction in the same way.

Συνεχίσουμε is first person plural, so it means we will continue.

The ending -ουμε / -σουμε is a very common clue for we forms in Greek.

In Greek, αύριο means tomorrow, and like English tomorrow, it usually does not need a preposition.

So:

• θα συνεχίσουμε αύριο = we will continue tomorrow

You do not need something like in or on here.

The comma helps separate the opening expression Καληνύχτα from the rest of the sentence.

It works a bit like:

• Good night, we’ll continue tomorrow...

Greek punctuation often separates greetings, introductory words, and clauses clearly with commas. The comma here is natural and standard.

It can mean both, depending on context.

In this sentence, γιατί means because:

• γιατί είμαι πολύ κουρασμένος = because I am very tired

But in a question, γιατί can also mean why:

• Γιατί είσαι εδώ; = Why are you here?

So the meaning depends on whether it introduces an explanation or asks a question.

Είμαι is the first person singular form of to be, meaning I am.

So:

• είμαι = I am
• είσαι = you are
• είναι = he/she/it is or they are

Here, the speaker is talking about themself, so είμαι is the correct form.

Here πολύ means very, modifying the adjective κουρασμένος:

• πολύ κουρασμένος = very tired

When πολύ is used as an adverb meaning very, it does not change form.

Compare:

• είμαι πολύ κουρασμένος = I am very tired
• έχω πολύ χρόνο = I have a lot of time

Greek learners often notice that πολύ can mean both very and much/a lot, depending on how it is used.

Κουρασμένος is the masculine singular form of tired.

Greek adjectives usually change form to match the gender and number of the person or thing they describe. So:

• κουρασμένος = masculine singular
• κουρασμένη = feminine singular
• κουρασμένο = neuter singular

So a male speaker would say:

• είμαι πολύ κουρασμένος

A female speaker would say:

• είμαι πολύ κουρασμένη

It is historically a participle, but in sentences like this it functions very much like an adjective meaning tired.

Greek uses many forms like this that come from verbs but are used as ordinary descriptive words.

So for a learner, the most helpful way to think about it here is simply:

• it agrees like an adjective
• it means tired
• it changes for gender and number

You probably could be understood, but it is less natural in neutral everyday Greek.

The normal order is:

• είμαι πολύ κουρασμένος

Greek word order is more flexible than English, but some orders sound more natural than others. Putting πολύ directly before the adjective is the standard way to say very tired.

Greek can sometimes use the present tense for future meaning, especially in informal speech and certain contexts, but θα + verb is the standard and clearest future construction.

So:

• συνεχίζουμε αύριο can sometimes mean we’re continuing tomorrow
• θα συνεχίσουμε αύριο clearly means we will continue tomorrow

Using θα makes the future meaning explicit.

Yes. Greek often leaves out subject pronouns when the verb ending already makes the subject clear.

In this sentence:

• θα συνεχίσουμε already shows we
• είμαι already shows I

So Greek does not need to say:

• εμείς θα συνεχίσουμε
• εγώ είμαι πολύ κουρασμένος

Those pronouns are only added if you want emphasis or contrast.

Because the speaker is saying:

• we will continue tomorrow but
• I am very tired

This is completely natural. The action of continuing involves more than one person, but the reason given is the speaker’s own condition.

English does this too:

• We’ll continue tomorrow because I’m very tired.

Yes. Καληνύχτα is used as good night, both:

• when someone is going to sleep
• and when ending a conversation late in the day or at night

It is not usually the same as good evening. For greeting someone in the evening, Greek uses καλησπέρα.
So:

• καλησπέρα = good evening
• καληνύχτα = good night

It is neutral and natural everyday Greek. It is not especially formal, but it is perfectly polite.

Nothing in it is slang. You could say it in many normal situations:

• to a friend
• to a teacher
• in a polite conversation
• in a message

If you wanted to sound more formal, the sentence would probably change through the wider context rather than through these specific words.

A female speaker would say:

Καληνύχτα, θα συνεχίσουμε αύριο, γιατί είμαι πολύ κουρασμένη.

The only change is:

• κουρασμένος → κουρασμένη

Everything else stays the same.

A rough pronunciation guide is:

• θα ≈ tha
• συνεχίσουμε ≈ si-ne-KHI-su-me

A few useful pronunciation notes:

• θ sounds like th in think
• χ is a rough sound, like the ch in Scottish loch or German Bach
• the stress is on χί in συνεχίσουμε

So the rhythm is roughly:

tha si-ne-KHI-su-me

The commas divide the sentence into clear parts:

• Καληνύχτα,
• θα συνεχίσουμε αύριο,
• γιατί είμαι πολύ κουρασμένος.

This punctuation makes the sentence easy to read and reflects natural pauses. The second comma separates the main statement from the explanation introduced by γιατί.

In less careful writing, people may use fewer commas, but this punctuation is perfectly normal and clear.