Περιπλανιόμαστε στην ύπαιθρο και μετά κατασκηνώνουμε.

Because Greek usually leaves subject pronouns out when the verb ending already shows the subject.

Both Περιπλανιόμαστε and κατασκηνώνουμε are 1st person plural forms, so we is already built in. You could add εμείς for emphasis or contrast, but it is not necessary.

So Greek naturally says:

Περιπλανιόμαστε ... και μετά κατασκηνώνουμε.

rather than explicitly saying Εμείς περιπλανιόμαστε ...

Because this verb is one of many Greek verbs that use middle/passive endings but have an active meaning.

Περιπλανιέμαι / Περιπλανιόμαστε means I wander / we wander, not I am wandered / we are wandered.

This kind of verb is often called deponent in grammar explanations. So the form looks middle/passive, but you translate it actively.

The ending -όμαστε tells you that the verb is:

• present tense
• 1st person plural
• in a middle/passive-form conjugation

So Περιπλανιόμαστε means we wander / we are wandering, depending on context.

It comes from the dictionary form περιπλανιέμαι.

Because κατασκηνώνω is an ordinary active verb, while περιπλανιέμαι is a verb that uses middle/passive-form endings.

So:

• περιπλανιόμαστε = middle/passive-form endings, active meaning
• κατασκηνώνουμε = active endings, active meaning

This is completely normal in Greek. Different verbs belong to different conjugation patterns.

Both verbs are in the present tense.

In Greek, the present often shows imperfective aspect, so it can describe:

• a habitual action
• a general activity
• something happening now
• a vivid sequence in narration

So depending on context, the sentence could feel like:

• We wander in the countryside and then camp
• We are wandering in the countryside and then we camp
• We wander around the countryside and afterwards we camp

English usually chooses the most natural wording from the context.

Στην is the contracted form of σε την.

So:

• σε + την = στην

Also, σε takes the accusative, so the noun appears as την ύπαιθρο.

A useful extra point: the final -ν in στην is normally kept before a vowel, and ύπαιθρο begins with a vowel sound, so στην ύπαιθρο is exactly what you would expect.

It can mean either, depending on the verb and context.

In this sentence, with Περιπλανιόμαστε, it most naturally means in the countryside or around the countryside, because wandering is something you do within a place.

With a motion verb, though, it could mean to the countryside. For example:

Πηγαίνουμε στην ύπαιθρο.
= We are going to the countryside.

So the phrase itself is flexible; the verb tells you how to understand it.

Η ύπαιθρος means the countryside, the rural area, or open country.

It does not simply mean any outdoor place. So στην ύπαιθρο suggests being out in a rural, non-urban environment.

If you only wanted to say outside or outdoors, Greek might use something else, such as:

• έξω
• στη φύση
• σε εξωτερικό χώρο

depending on the situation.

Here μετά means then or afterwards.

So και μετά is a very natural way to say and then.

In other contexts, μετά can also work as a preposition meaning after, but that is not what it is doing here. In this sentence it is an adverb linking the two actions in sequence.

Yes, but και μετά is very natural and conversational.

• και μετά = and then
• μετά by itself = then / afterwards

So:

• Περιπλανιόμαστε στην ύπαιθρο και μετά κατασκηνώνουμε.
• Περιπλανιόμαστε στην ύπαιθρο· μετά κατασκηνώνουμε.

Both work, but the version with και μετά feels especially smooth as a simple sequence of events.

Very natural.

Greek word order is more flexible than English, but this order is neutral and easy:

• verb
• place phrase
• and then
• second verb

So:

Περιπλανιόμαστε στην ύπαιθρο και μετά κατασκηνώνουμε.

sounds like a straightforward description of what we do first and what we do next.

You could rearrange parts for emphasis, but this version is a very normal default.

A rough pronunciation guide is:

Περιπλανιόμαστε → pe-ri-pla-NYO-ma-ste
στην ύπαιθρο → stin EE-pe-thro
και μετά → ke me-TA
κατασκηνώνουμε → ka-ta-ski-NO-u-me

A few helpful sound notes:

• θ sounds like th in thin
• αι sounds like e
• the stressed syllables are the ones marked by the accents:
  • περιπλανιόμαστε
  • ύπαιθρο
  • μετά
  • κατασκηνώνουμε

So the whole sentence flows roughly as:

pe-ri-pla-NYO-ma-ste stin EE-pe-thro ke me-TA ka-ta-ski-NO-u-me