Συνηθίζω να πηγαίνω στο πάρκο μετά τη δουλειά, εκτός αν βρέχει.

Modern Greek normally does not use an infinitive the way English does. Instead, it often uses να + verb.

So where English says I usually go, Greek says συνηθίζω να πηγαίνω.

Because this sentence is about a repeated, habitual action. πηγαίνω fits that ongoing/repeated sense very well.

You may hear πάω in everyday Greek too, but with συνηθίζω να..., πηγαίνω is the more natural choice for I usually go.

στο is a contraction of σε + το.

• σε = to / at / in
• το = the

So στο πάρκο means to the park here.

This phrase means after work.

• μετά = after
• τη δουλειά = the work / work in the accusative

Greek often uses the article in expressions like this, so μετά τη δουλειά is completely natural.

Both are possible. την is the full form of the feminine accusative article, and τη is a very common shortened form before consonants.

So:

• τη δουλειά
• την δουλειά

are both correct, though τη δουλειά is very common in normal speech and writing.

Because μετά can be used directly before a noun phrase in time expressions like this.

So μετά τη δουλειά is perfectly normal Greek.

You may also hear μετά από τη δουλειά, but here μετά τη δουλειά is simple, idiomatic, and very common.

εκτός αν means unless.

Literally, it is close to except if:

• εκτός = except / outside
• αν = if

So it introduces the exception to the usual routine.

Because Greek weather verbs are impersonal. Greek simply says:

• βρέχει = it rains / it’s raining

English needs the dummy subject it, but Greek does not.

Yes, and the meaning is very close, but the nuance changes a little.

• εκτός αν βρέχει = unless it’s raining / unless the weather is rainy
• εκτός αν βρέξει = unless it rains / unless it ends up raining

In a sentence about a general habit, βρέχει sounds very natural.

Because Greek uses the present tense for habits and repeated actions, just like English does.

So:

• συνηθίζω = I usually do
• πηγαίνω = I go
• βρέχει = it rains / it’s raining

They do not have to mean right now; they can describe what generally happens.

No. Greek usually leaves out subject pronouns when the verb ending already shows the person.

Συνηθίζω already tells you the subject is I, so εγώ is unnecessary unless you want emphasis or contrast.