Το πορτοφόλι μου έμεινε στο γραφείο, αλλά ευτυχώς είχα λίγα κέρματα στην τσάντα μου.

In Greek, possessed nouns usually still keep the definite article. So Greek normally says:

• το πορτοφόλι μου = my wallet
• η τσάντα μου = my bag

This is different from English, where my replaces the. In Greek, the article and the possessive pronoun often appear together.

So το πορτοφόλι μου is the normal, natural way to say my wallet.

μου means my in this sentence.

More literally, it is the weak genitive form of the pronoun I / me, and Greek uses it after the noun:

• το πορτοφόλι μου = my wallet
• στην τσάντα μου = in my bag

So unlike English, where my comes before the noun, Greek often places μου after the noun.

Yes, έμεινε comes from μένω, which means stay, remain, or be left.

In this sentence, Το πορτοφόλι μου έμεινε στο γραφείο means something like:

• My wallet stayed at the office
• My wallet was left at the office
• I left my wallet at the office

Greek often uses μένω in this kind of situation to mean that something ended up being left behind somewhere.

So it is not necessarily saying the wallet deliberately stayed there; it means it was accidentally left there.

έμεινε is:

• aorist
• 3rd person singular
• from μένω

It matches το πορτοφόλι, which is singular, so Greek uses he/she/it stayed/remained:

• το πορτοφόλι μου έμεινε = my wallet was left / remained

The aorist here presents the event as a single completed fact: the wallet ended up left at the office.

στο is a contraction of:

• σε = in / at / to
• το = the

So:

• σε το → στο

Therefore:

• στο γραφείο = in the office / at the office

This contraction is extremely common in Greek.

After σε, Greek normally uses the accusative case.

So:

• dictionary form: το γραφείο
• after σε / στο: στο γραφείο

For this noun, the nominative and accusative singular look the same, so you do not see a change in the ending.

Also, γραφείο can mean office or desk depending on context. In this sentence, office is the more natural meaning.

Yes. αλλά is the normal word for but.

So:

• ..., αλλά ... = ..., but ...

It connects the two parts of the sentence:

• the problem: Το πορτοφόλι μου έμεινε στο γραφείο
• the positive contrast: ευτυχώς είχα λίγα κέρματα στην τσάντα μου

ευτυχώς means fortunately or luckily.

It is an adverb, and it comments on the whole situation:

• αλλά ευτυχώς... = but fortunately...

It does not change form here. It is simply adding the speaker’s attitude: this was a lucky circumstance.

είχα is the imperfect of έχω (to have), first person singular:

• έχω = I have
• είχα = I had

In this sentence:

• είχα λίγα κέρματα = I had a few coins

The imperfect often gives background information or describes a state in the past. Here it fits well because it describes what the speaker had available at that moment.

λίγα means few / a few and it agrees with κέρματα.

• κέρμα = coin
• κέρματα = coins (neuter plural)

Because κέρματα is neuter plural, λίγα must also be neuter plural.

So:

• λίγα κέρματα = a few coins

This is a good example of adjective agreement in Greek: adjectives change form to match the noun’s gender, number, and case.

Yes, but the difference is small.

• λίγα κέρματα = a few coins, often emphasizing not many
• μερικά κέρματα = some coins, often a bit more neutral

In this sentence, λίγα κέρματα makes sense because coins are a small amount of money, and that slight sense of only a few fits the context well.

στην is the contraction of:

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

So:

• σε την → στην

And:

• η τσάντα = the bag (feminine)
• after σε / στην it becomes στην τσάντα

So:

• στην τσάντα μου = in my bag

Because σε normally takes the accusative case.

So the noun phrase changes like this:

• nominative: η τσάντα
• accusative: την τσάντα

When contracted with σε, that becomes:

• στην τσάντα

This is a very common Greek pattern.

Greek word order is often more flexible than English, but some patterns are very common.

With possession, Greek usually says:

• the noun + μου
• το πορτοφόλι μου
• η τσάντα μου

This is just the standard way Greek expresses my wallet, my bag, and so on.

The overall sentence order is also natural Greek:

• statement 1
• αλλά
• adverb ευτυχώς
• statement 2

So even if it does not match English word-for-word, it sounds normal in Greek.

Yes. Greek offers other natural ways to express a similar meaning. For example:

• Ξέχασα το πορτοφόλι μου στο γραφείο, αλλά ευτυχώς είχα λίγα κέρματα στην τσάντα μου.

  • I forgot my wallet at the office, but fortunately I had a few coins in my bag.

• Άφησα το πορτοφόλι μου στο γραφείο...

  • I left my wallet at the office...

But the original version with έμεινε is very natural because it focuses on the result: the wallet ended up left there.

A learner should especially notice these:

• Article + possessed noun

  • το πορτοφόλι μου, την τσάντα μου

• Aorist for a completed event

  • έμεινε = was left / remained

• Imperfect for a past state

  • είχα = I had

• Contractions with σε

  • στο = σε + το
  • στην = σε + την

• Adjective agreement

  • λίγα κέρματα because κέρματα is neuter plural

If you understand those five things, you understand most of the sentence structurally.