Αν η άμμος μπει στην τσάντα, την αδειάζω στο μπαλκόνι και μετά την καθαρίζω καλά.

Because after αν in this kind of condition, Greek usually uses the subjunctive, not the ordinary present indicative.

So:

• μπει = aorist subjunctive of μπαίνω
• αν ... μπει = if ... gets in / if ... goes in

This pattern is very common for real future or repeated conditions:

• Αν έρθει, θα μιλήσουμε. = If he comes, we’ll talk.
• Αν βρέξει, δεν θα πάμε. = If it rains, we won’t go.

Here, αν η άμμος μπει στην τσάντα means something like if sand gets into the bag.

Using μπαίνει would sound more like a statement about what is happening habitually or right now, not the normal conditional pattern used here.

Μπει is the 3rd person singular aorist subjunctive of μπαίνω (to enter / to go in).

Breakdown:

• dictionary form: μπαίνω
• aorist stem: μπ- / μπήκ- pattern
• subjunctive form here: να μπει
• after αν, Greek uses the same subjunctive form but without να: αν μπει

So:

• να μπει = to go in / to get in
• αν μπει = if it gets in

Since the subject is η άμμος (the sand), which is singular, the verb is singular too.

Because άμμος is simply a feminine noun in Greek.

Its article is:

• η άμμος = the sand

This is something learners often just need to memorize with the noun. Greek nouns have grammatical gender, and it does not always match what an English speaker expects.

A useful thing to notice here is that this feminine gender affects other words later in the sentence, especially the pronoun την, which refers to την τσάντα, another feminine noun.

Στην is a contraction of:

• σε = in / to / at
• την = the (feminine accusative singular)

So:

• σε την τσάντα → στην τσάντα

This means into the bag or in the bag, depending on context.

In this sentence, because the verb is μπει (gets in / enters), στην τσάντα is best understood as into the bag.

Similar contractions:

• σε το → στο
• σε τον → στον

Both την pronouns refer to την τσάντα (the bag).

The sentence says:

• την αδειάζω = I empty it
• την καθαρίζω = I clean it

Since τσάντα is feminine singular, the direct object pronoun is την.

So Greek avoids repeating την τσάντα and uses the pronoun instead, just like English uses it.

A literal breakdown:

• Αν η άμμος μπει στην τσάντα = If sand gets into the bag
• την αδειάζω = I empty it
• και μετά την καθαρίζω καλά = and then I clean it well/thoroughly

In Greek, weak object pronouns like με, σε, τον, την, το, μας, σας, τους usually come before the finite verb.

So Greek says:

• την αδειάζω
• την καθαρίζω

where English says:

• I empty it
• I clean it

This word order is completely normal in Greek.

Compare:

• Βλέπω την τσάντα. = I see the bag.
• Την βλέπω. = I see it.

So for English speakers, one important adjustment is that Greek often puts short object pronouns before the verb.

Here αδειάζω means I empty or I empty out.

So την αδειάζω στο μπαλκόνι means:

• I empty it onto the balcony
• more naturally in English: I empty the bag out on the balcony

Greek is focusing on the bag as the direct object:

• αδειάζω την τσάντα = I empty the bag

English often focuses more on the contents:

• I empty the sand out of the bag

Both ideas are compatible here.

Στο is the contraction of:

• σε
  • το = στο

And μπαλκόνι is a neuter noun:

• το μπαλκόνι = the balcony

So:

• στο μπαλκόνι = on the balcony / onto the balcony

In this sentence, because the bag is being emptied there, English may translate it as either on the balcony or onto the balcony, depending on how natural the translation sounds.

Because here μετά is an adverb, meaning afterwards / then.

So:

• και μετά την καθαρίζω καλά = and then I clean it thoroughly

But μετά can also be a preposition, in which case it usually means after and is followed by από in Modern Greek:

• μετά από το μάθημα = after the lesson
• μετά από λίγο = after a little while

So the difference is:

• μετά alone = then / afterwards
• μετά από ... = after ...

Here καλά means well or, more naturally in this context, thoroughly.

So:

• την καθαρίζω καλά = I clean it well / I clean it thoroughly

It modifies the verb καθαρίζω (I clean), so it works as an adverb.

In everyday Greek, καλά is very common and can have several meanings depending on context, such as:

• well
• properly
• thoroughly
• sometimes even OK / fine

In this sentence, thoroughly is probably the best natural English sense.

Because Greek often uses the present tense in the main clause to express a habitual or general result.

So:

• Αν η άμμος μπει στην τσάντα, την αδειάζω...
  can mean
• If sand gets into the bag, I empty it...

This sounds like a usual reaction or routine: whenever that happens, this is what I do.

If you wanted to stress a more specific future result, Greek could use θα:

• Αν η άμμος μπει στην τσάντα, θα την αδειάσω...
  = If sand gets into the bag, I will empty it...

So the present here is not wrong at all; it suggests a regular practice.

Yes, pretty much.

The verb μπαίνω means go in / enter / get into.

So:

• η άμμος μπει στην τσάντα = the sand gets into the bag

English often prefers get into in this context, because sand is not intentionally “entering” anything. Greek μπαίνω is broader and works very naturally here.

You can think of it as:

• μπαίνω στο σπίτι = I go into the house
• μπαίνει νερό στο παπούτσι = water gets into the shoe
• μπήκε άμμος στην τσάντα = sand got into the bag

Because άμμος is a mass noun, like English sand.

Mass nouns refer to a substance rather than countable individual items. So both Greek and English normally use the singular:

• η άμμος = the sand

If you were talking about separate grains, you would use a different expression, such as κόκκοι άμμου (grains of sand).

So the singular here is exactly what you would expect.

The structure is:

• Αν + clause = if-clause
• then the main clause with two actions

More specifically:

1. Αν η άμμος μπει στην τσάντα
   = If sand gets into the bag

2. την αδειάζω στο μπαλκόνι
   = I empty it on/onto the balcony

3. και μετά την καθαρίζω καλά
   = and then I clean it thoroughly

So the overall pattern is:

• condition → response/action 1 → response/action 2

This is a very natural Greek sentence, and it is a good example of:

• αν + subjunctive
• object pronouns before the verb
• everyday verbs like αδειάζω and καθαρίζω

Yes, it could, but it would usually sound less natural unless you want emphasis or clarity.

For example:

• Αν η άμμος μπει στην τσάντα, αδειάζω την τσάντα στο μπαλκόνι και μετά καθαρίζω την τσάντα καλά.

This is grammatically possible, but it sounds repetitive.

Greek, like English, prefers pronouns when the reference is already clear:

• την αδειάζω
• την καθαρίζω

So the original sentence sounds much more natural.

Its basic meaning is clean.

Here:

• την καθαρίζω καλά = I clean it thoroughly

Depending on context, καθαρίζω can sometimes feel like:

• clean
• clear out
• remove dirt from
• tidy up

But in this sentence, because we are talking about sand in a bag, the meaning is straightforwardly clean.

So the sequence is:

1. empty the bag
2. then clean the bag well

That makes the meaning very natural.