Το καλάθι μου ήταν τόσο βαρύ που τελικά πήρα και δεύτερη σακούλα.

Το καλάθι μου is the normal way to say my basket in Greek.

A few key points:

• το καλάθι = the basket
• μου = my / of me

In Greek, possessive words like μου, σου, του, της usually come after the noun:

• το βιβλίο μου = my book
• η τσάντα της = her bag
• οι φίλοι μας = our friends

So το καλάθι μου is the natural order.

Μου το καλάθι would not be normal in standard Greek for simple possession.

Greek uses the definite article much more often than English does, especially with possessives.

So Greek typically says:

• το καλάθι μου = my basket
• το σπίτι μας = our house
• η μητέρα του = his mother

Even though English does not use the in my basket, Greek usually does.

Leaving out the article can sound poetic, very informal in certain contexts, or stylistically marked, but in standard everyday Greek, το καλάθι μου is the expected form.

Καλάθι is in the nominative singular because it is the subject of ήταν.

The structure is:

• Το καλάθι μου = the subject
• ήταν = was
• τόσο βαρύ = so heavy

So the sentence begins with My basket was..., and that makes καλάθι the subject.

Also:

• καλάθι is a neuter noun
• singular nominative form: το καλάθι

Ήταν is the imperfect form of είμαι (to be). It is used here because it describes a state in the past:

• Το καλάθι μου ήταν τόσο βαρύ...
• My basket was so heavy...

The imperfect often gives background description or an ongoing state in the past. That fits perfectly here: the basket was in a heavy condition, and that situation led to the next action.

In this sentence, Greek is not focusing on a single completed becoming event, but on the condition of the basket.

Τόσο ... που is a very common Greek pattern meaning so ... that.

In this sentence:

• τόσο βαρύ = so heavy
• που = that

So:

• Το καλάθι μου ήταν τόσο βαρύ που...
• My basket was so heavy that...

You can use this pattern with many adjectives and adverbs:

• Ήταν τόσο κουρασμένος που κοιμήθηκε αμέσως.
  He was so tired that he fell asleep immediately.

• Μιλάει τόσο γρήγορα που δεν τον καταλαβαίνω.
  He speaks so quickly that I don’t understand him.

This is one of the most useful cause-result structures in Greek.

Here, που means that, introducing the result clause:

• τόσο βαρύ που... = so heavy that...

But που is a very flexible word in Greek. Depending on context, it can also function in ways similar to:

• that
• who/which
• sometimes a linker in everyday speech

In this sentence, though, the role is straightforward: it introduces the consequence of the basket being heavy.

So the important thing to recognize here is the full pattern:

• τόσο + adjective/adverb + που

not just που by itself.

Because καλάθι is a neuter noun, the adjective must agree with it.

• βαρύς = masculine singular
• βαριά = feminine singular
• βαρύ = neuter singular

Since το καλάθι is neuter, Greek uses:

• το καλάθι ήταν βαρύ

This is adjective agreement:

• ο σάκος είναι βαρύς = the sack is heavy
• η τσάντα είναι βαριά = the bag is heavy
• το καλάθι είναι βαρύ = the basket is heavy

Τελικά here means something like:

• in the end
• eventually
• after all

So:

• τελικά πήρα... = in the end I took...

It signals the final outcome after a situation developed. In this sentence, the basket was very heavy, and as a result, the speaker eventually decided to take another bag.

Be careful: τελικά does not usually mean finally in the sense of at last! with emotional relief. It is more like ultimately / in the end.

Πήρα is the aorist form of παίρνω (to take/get). It is used because the speaker is referring to a single completed action:

• I took a second bag.

That action happened once and was completed.

By contrast, έπαιρνα is the imperfect, which would usually suggest:

• repeated action
• ongoing action
• habitual action
• background action

So in this sentence:

• πήρα = I took / I got
• έπαιρνα would sound wrong or at least unnatural in this context, because the speaker is not describing an ongoing process of taking bags.

Because Greek often leaves out subject pronouns when they are not needed.

The ending of the verb already shows the subject:

• πήρα = I took
• πήρες = you took
• πήρε = he/she/it took

So Greek does not need εγώ unless there is special emphasis or contrast.

Compare:

• Πήρα δεύτερη σακούλα. = I took a second bag.
• Εγώ πήρα δεύτερη σακούλα. = I took a second bag. (emphatic, contrastive)

In your sentence, there is no special need to stress I, so the pronoun is omitted.

Here και is not a simple and joining two nouns or clauses. It means something closer to:

• also
• too
• sometimes even

So πήρα και δεύτερη σακούλα means:

• I also took a second bag
• or more naturally in context, I ended up taking a second bag too

The idea is that, in addition to what was already happening, the speaker added one more thing: another bag.

This use of και is very common in spoken and written Greek.

Both are possible, but δεύτερη σακούλα without μια is completely natural in Greek.

Greek often omits the indefinite article where English would use a/an:

• πήρα δεύτερη σακούλα = I took a second bag

You can also say:

• πήρα μια δεύτερη σακούλα

That is also correct, but it can sound slightly more explicit or more specific depending on context.

So:

• δεύτερη σακούλα = very natural
• μια δεύτερη σακούλα = also correct

Greek is generally more flexible than English here.

It is in the accusative singular, because it is the direct object of πήρα.

The verb παίρνω takes a direct object:

• πήρα σακούλα = I took a bag

So:

• δεύτερη agrees with σακούλα
• both are feminine singular accusative

A useful detail: for many feminine nouns and adjectives, the nominative and accusative singular can look the same in everyday Greek:

• μια δεύτερη σακούλα
• τη δεύτερη σακούλα

So you recognize the case mainly from the function in the sentence, not only from the form.

Because Greek normally places adjectives like δεύτερη before the noun in this type of phrase:

• δεύτερη σακούλα = second bag
• μεγάλο σπίτι = big house
• καλό βιβλίο = good book

That said, Greek word order can be flexible, and adjective position can sometimes change for emphasis or style. But in a basic phrase like this, δεύτερη σακούλα is the normal order.

Also, δεύτερη agrees with σακούλα in:

• gender: feminine
• number: singular
• case: accusative here

Yes. Σακούλα commonly means bag, especially a shopping bag, plastic bag, or similar carry bag.

So in a shopping context:

• πήρα δεύτερη σακούλα = I took a second bag

That sounds very natural.

Depending on context, Greek has other words too, such as:

• τσάντα = bag, handbag, school bag, general bag
• σακούλα = shopping bag, plastic bag, carry bag

So σακούλα is the right choice here because the sentence suggests carrying shopping items.

Yes. Καλάθι often means a basket, including a shopping basket.

In a supermarket context:

• καλάθι = basket
• καρότσι = shopping cart / trolley

So if the speaker says:

• Το καλάθι μου ήταν τόσο βαρύ...

the image is probably a hand basket that became too heavy, which explains why they took another bag.

Not in the same structure.

This sentence uses a result pattern:

• τόσο βαρύ που... = so heavy that...

If you use γιατί, you switch to a cause pattern:

• Πήρα δεύτερη σακούλα γιατί το καλάθι μου ήταν πολύ βαρύ.
  I took a second bag because my basket was very heavy.

Both sentences are natural, but they are built differently:

• τόσο ... που = emphasizes result
• γιατί = gives a reason more directly

So που is correct here because the sentence is specifically using the so...that... construction.

It breaks down like this:

• Το καλάθι μου = my basket
• ήταν = was
• τόσο βαρύ = so heavy
• που = that
• τελικά = in the end / eventually
• πήρα = I took
• και = also / too
• δεύτερη σακούλα = a second bag

So the structure is:

subject + was + so + adjective + that + eventually + I took + also + second bag

This is a very useful model to learn because you can reuse it with many other words:

• Ήταν τόσο αργά που έφυγα.
• Ήμουν τόσο κουρασμένος που κοιμήθηκα αμέσως.
• Το κουτί ήταν τόσο βαρύ που χρειάστηκα βοήθεια.

It is a common and natural Greek sentence pattern.