Άφησα το τάπερ στο ψυγείο για αύριο.

Άφησα means I left.

It is the aorist form of αφήνω (to leave). In this sentence, the aorist shows a single completed action in the past: the speaker left the container in the fridge.

• αφήνω = I leave / I am leaving
• άφησα = I left

So the sentence is talking about one finished action, not an ongoing situation.

Greek often drops subject pronouns when they are not needed, because the verb ending already shows the person.

In Άφησα, the ending tells you it means I left, so adding εγώ (I) is usually unnecessary.

You could say Εγώ άφησα το τάπερ στο ψυγείο για αύριο, but that would sound more emphatic, like:

• I left it
• It was me who left it

In neutral speech, just Άφησα is enough.

Yes—τάπερ is very common in everyday Greek. It comes from the brand name Tupperware, but in normal speech it usually means a plastic food container.

It is treated as a neuter noun, so here it takes the article το:

• το τάπερ = the container / the Tupperware container

This kind of brand-name-to-common-word usage is very common in many languages.

Also, τάπερ is often treated as indeclinable in everyday Greek, so its form usually stays the same.

Because τάπερ is used as a neuter singular noun.

Greek nouns normally need an article much more often than English nouns do. So:

• το τάπερ = the container
• ένα τάπερ = a container

Here the speaker is talking about a specific container, so το is used.

στο ψυγείο means in the fridge / into the fridge, depending on context.

Here it means in the fridge.

Grammatically, στο is the contraction of:

• σε + το = στο

So:

• σε = in / to / at
• το ψυγείο = the fridge
• στο ψυγείο = in the fridge

This contraction is extremely common in Greek.

Because Greek usually uses σε + article when referring to a specific noun.

So instead of saying just σε ψυγείο, Greek normally says:

• σε ένα ψυγείο = in a fridge
• στο ψυγείο = in the fridge

Since this is a specific fridge, σε + το becomes στο.

After σε, Greek uses the accusative case.

However, with many neuter nouns, the nominative and accusative forms are the same. That is what happens here:

• nominative: το ψυγείο
• accusative: το ψυγείο

So the case does change grammatically, but the form looks the same.

για αύριο means for tomorrow.

In this sentence, it means the speaker left the container in the fridge so it would be there for tomorrow—for example, to eat tomorrow, take tomorrow, or use tomorrow.

So the idea is not just time in a vague sense, but intended use tomorrow.

Not exactly.

• για αύριο = for tomorrow, intended for tomorrow
• μέχρι αύριο = until tomorrow

So:

• Άφησα το τάπερ στο ψυγείο για αύριο = I left the container in the fridge for tomorrow
• Άφησα το τάπερ στο ψυγείο μέχρι αύριο = I left the container in the fridge until tomorrow

In many situations these ideas may overlap, but they are not the same thing.

Not by itself.

Άφησα normally means I left or I put and left. It does not automatically mean that it was accidental.

If you want to say I forgot it in the fridge, Greek would more naturally use something like:

• Το ξέχασα στο ψυγείο = I forgot it in the fridge

So this sentence does not imply forgetfulness unless the wider context suggests it.

Yes, Greek word order is more flexible than English word order.

The neutral order here is:

• Άφησα το τάπερ στο ψυγείο για αύριο.

But other orders are possible, depending on emphasis. For example:

• Το τάπερ το άφησα στο ψυγείο για αύριο.
  This puts more focus on the container.

• Για αύριο άφησα το τάπερ στο ψυγείο.
  This emphasizes for tomorrow.

The original order is a very natural, neutral way to say it.

Here αύριο is functioning like tomorrow, a time expression.

In Greek, αύριο is very commonly used as an adverb:

• Αύριο φεύγω. = I’m leaving tomorrow.

After για, it forms the phrase για αύριο, meaning for tomorrow.

So you do not need an article here. Greek naturally says:

• για αύριο

not

• για το αύριο

in this context.

A rough pronunciation is:

AH-fee-sa to TA-per sto psi-YEE-o ya AV-rio

A few useful notes:

• Άφησα has the stress on the first syllable: Ά-φη-σα
• τάπερ has the stress on τά
• ψυγείο has the stress on εί: ψυ-γεί-ο
• αύριο is stressed on αύ

Also, ψ at the beginning of ψυγείο is like ps in lapse, but at the start of the word.

Yes. If you want a more general or more formal word, you could use something like:

• δοχείο = container
• πλαστικό δοχείο = plastic container
• φαγητοδοχείο = food container / lunch container

For example:

• Άφησα το δοχείο στο ψυγείο για αύριο.

But in everyday spoken Greek, τάπερ is extremely natural and common.

It breaks down like this:

• Άφησα = I left
• το τάπερ = the container
• στο ψυγείο = in the fridge
• για αύριο = for tomorrow

So the pattern is:

verb + object + place + purpose/time reference

That makes the whole sentence feel very natural and straightforward in Greek.