Απορώ πώς αυτός ο σκύλος έγινε τόσο χοντρός, αφού περπατάει κάθε μέρα στο πάρκο.

Yes. Απορώ is the 1st person singular present of απορώ, and here it means I wonder or I can’t understand.

It often expresses mild surprise or puzzlement, not necessarily a formal question. In this sentence, the speaker is saying they are puzzled about the dog’s weight.

Greek often leaves out subject pronouns, so there is no separate word for I. The ending -ώ already tells you the subject is I.

Yes. πώς means how, and here it introduces an indirect question:

• Απορώ πώς... = I wonder how...

So the speaker is not directly asking someone How did this dog get so fat? but embedding that question inside a larger sentence.

A learner may also notice that πώς has an accent. In standard spelling, πώς is usually the interrogative word how, while πως can function as that in some contexts.

This is a very common Greek pattern:

• αυτός ο σκύλος = this dog

Greek normally uses:

• a demonstrative (αυτός, αυτή, αυτό)
• plus the definite article (ο, η, το)
• plus the noun

So:

• αυτός ο σκύλος = this dog
• αυτή η γυναίκα = this woman
• αυτό το παιδί = this child

For English speakers, the extra article can feel strange, but in Greek it is standard.

Yes, but the feel is different.

• αυτός ο σκύλος is the most neutral and common way to say this dog
• ο σκύλος αυτός is possible, but it can sound more emphatic, literary, or stylistically marked depending on context

For everyday speech, αυτός ο σκύλος is the form learners should expect most often.

Έγινε is the aorist (simple past) of γίνομαι, meaning became.

So:

• έγινε τόσο χοντρός = became so fat / got so fat

The aorist is used because the sentence refers to the change into a fat state as a completed development.

If Greek used a present form like γίνεται, that would mean is becoming, which would suggest an ongoing process rather than the result being noticed now.

Good question. The difference is:

• είναι τόσο χοντρός = he is so fat
  focuses on the current state

• έγινε τόσο χοντρός = he became / got so fat
  focuses on the change that led to that state

In this sentence, the speaker is puzzled about how the dog ended up this way, so έγινε is the natural choice.

Τόσο means so, so much, or to such a degree.

So:

• τόσο χοντρός = so fat

It intensifies the adjective χοντρός.

Also notice agreement:

• σκύλος is masculine singular
• so the adjective is also masculine singular: χοντρός

Other forms would be:

• χοντρή for feminine
• χοντρό for neuter

Often yes, it means fat, thick, or big/heavy, depending on context.

For a person or animal, χοντρός usually refers to being overweight or very bulky. Like English fat, it can sound blunt or insensitive depending on the situation.

In this sentence, it describes the dog’s size in a fairly direct way. A softer word in some contexts could be παχύς, but χοντρός is very common in everyday Greek.

Here αφού does not mean after. It means something like:

• since
• given that
• considering that

So the logic is:

I wonder how this dog got so fat, since he walks every day in the park.

This is a very important point because αφού can have different meanings depending on context:

1. temporal: after
2. causal/explanatory: since / given that

In this sentence, it is clearly the second one.

Because it describes a habitual action:

• περπατάει κάθε μέρα = he walks every day

The present tense in Greek is commonly used for repeated or regular actions, just like in English.

So the meaning is not he is walking right now, but he regularly walks.

Also, you may see both:

• περπατάει
• περπατά

Both are acceptable in Modern Greek. Περπατάει is very common in everyday usage.

Because κάθε means every, and Greek normally does not use the definite article after it in this kind of expression.

• κάθε μέρα = every day
• κάθε εβδομάδα = every week
• κάθε χρόνο = every year

This is a fixed and very common pattern.

Στο is a contraction of:

• σε = in / to / at
• το = the

So:

• σε το πάρκο becomes στο πάρκο
• στο πάρκο = in the park or to the park, depending on context

Here, with περπατάει, it means in the park.

These contractions are very common:

• στο = σε + το
• στη = σε + τη(ν)
• στον = σε + τον

Because αφού περπατάει κάθε μέρα στο πάρκο is a subordinate clause giving the reason or explanation behind the speaker’s surprise.

The comma helps separate:

• the main clause: Απορώ πώς αυτός ο σκύλος έγινε τόσο χοντρός
• the explanatory clause: αφού περπατάει κάθε μέρα στο πάρκο

Greek punctuation often marks these clause boundaries clearly.

Yes. The subject is understood to be αυτός ο σκύλος in both parts.

So:

• αυτός ο σκύλος έγινε τόσο χοντρός
• (αυτός ο σκύλος) περπατάει κάθε μέρα στο πάρκο

Greek often avoids repeating subjects when they are already clear from context and verb endings. That is very natural Greek style.

The sentence has three main parts:

1. Απορώ
   = I wonder / I’m puzzled

2. πώς αυτός ο σκύλος έγινε τόσο χοντρός
   = an indirect question: how this dog got so fat

3. αφού περπατάει κάθε μέρα στο πάρκο
   = explanatory clause: since he walks every day in the park

So the whole structure is:

• main verb of puzzlement
• indirect question
• reason/explanation clause

This is a very natural and common Greek sentence pattern.