Eğer yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.

Eğer means if.

In this sentence, it introduces the condition:

• Eğer yarın erken kalkarsan = If you get up early tomorrow

It is not always necessary in Turkish, because the conditional ending on the verb already shows the if meaning.

So these are both possible:

• Eğer yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.
• Yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.

The version with eğer is just a little more explicit, like clearly marking the sentence as a condition.

Kalkarsan comes from:

• kalk- = to get up / to wake up / to rise
• -arsa / -erse = conditional ending, meaning if
• -n = you (singular)

So:

• kalkarsan = if you get up

More literally, it is something like:

• kalk-ar-sa-n

In practice, learners usually just remember -sa / -se as the main if marker, with the person ending added after it.

Because of vowel harmony and sound patterns, the form becomes kalkarsan, not something like kalksen.

Because Turkish often puts the subject information on the verb itself.

In kalkarsan, the final -n shows that the subject is you (singular). So Turkish does not need a separate sen unless you want emphasis.

Compare:

• kalkarsan = if you get up
• sen kalkarsan = if you get up / if you get up

The version with sen sounds more emphatic or contrastive.

Because kalkarsan is the normal way to express a real future condition here:

• yarın erken kalkarsan = if you get up early tomorrow

By contrast, kalkıyorsan usually means something more like:

• if you are getting up
• if you do get up
• if it is the case that you get up

That form is possible in some contexts, but for a straightforward future condition, kalkarsan is the natural choice.

So for If you get up early tomorrow..., Turkish usually prefers:

• yarın erken kalkarsan

Birlikte means together.

Here it modifies the action of walking:

• birlikte yürüyüş yapmalıyız = we should take a walk together

Its position is quite flexible in Turkish. You could also hear:

• Eğer yarın erken kalkarsan, yürüyüşü birlikte yapmalıyız.
• Eğer yarın erken kalkarsan, birlikte bir yürüyüş yapmalıyız.

But the original placement is very natural.

Turkish often uses a noun + yapmak structure where English uses a simple verb.

Here:

• yürüyüş = walk, stroll, hike
• yapmak = to do / to make

So:

• yürüyüş yapmak = to take a walk / to go for a walk

Turkish also has the verb yürümek, which means to walk.

So there is a difference in feel:

• birlikte yürüyelim = let's walk together
• birlikte yürüyüş yapalım = let's go for a walk together

The yürüyüş yapmak version often suggests a more intentional activity, like going out for a walk as a plan.

Yapmalıyız means we should do or we must do, depending on context.

It is built from:

• yap- = do
• -malı / -meli = should / must / need to
• -yız / -yiz / -yuz / -yüz = we are / we ending in this structure

So:

• yapmalıyız = we should do

In this sentence:

• birlikte yürüyüş yapmalıyız = we should take a walk together

This often sounds like a suggestion or recommendation, not always a strict obligation.

Yes, usually.

Compare:

• yapalım = let's do it
• yapmalıyız = we should do it / we ought to do it

So:

• Birlikte yürüyüş yapalım. = Let's take a walk together.
• Birlikte yürüyüş yapmalıyız. = We should take a walk together.

The sentence you gave sounds a bit like:

• If you get up early tomorrow, we should go for a walk together.

That is slightly more reflective or advisory than a direct let's suggestion.

Because the condition is about you, but the result is about both of us.

So the structure is:

• If you get up early tomorrow → condition about you
• we should take a walk together → result involving us

This is completely normal in both Turkish and English.

Yes. Kalkmak can often mean:

• to get up
• to wake up
• to rise

In everyday English, the best translation depends on context.

So all of these may work:

• If you get up early tomorrow, we should take a walk together.
• If you wake up early tomorrow, we should take a walk together.

If you want to focus specifically on the moment of waking from sleep, Turkish also has uyanmak = to wake up.

So:

• uyanırsan = if you wake up
• kalkarsan = if you get up

But in casual use, English translations can overlap.

Yes, Turkish word order is flexible, although some orders sound more natural than others.

The original sentence is very natural:

• Eğer yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.

You could also say:

• Yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.
• Eğer yarın erken kalkarsan, yürüyüş yapmalıyız birlikte.
  This is possible, but less neutral.
• Birlikte yürüyüş yapmalıyız eğer yarın erken kalkarsan.
  Also possible, but it sounds more marked.

For learners, the safest pattern is:

• condition first, result second

So the original version is a good model.

The comma separates the if-clause from the main clause:

• Eğer yarın erken kalkarsan, = conditional part
• birlikte yürüyüş yapmalıyız. = main idea

This is similar to English punctuation when the if clause comes first:

• If you get up early tomorrow, we should take a walk together.

In Turkish, the comma is commonly used here and helps readability.

Sometimes, yes, depending on style.

The most common neutral word is eğer.

But in speech, people often just drop it and use the conditional ending alone:

• Yarın erken kalkarsan, birlikte yürüyüş yapmalıyız.

That is probably even more common in everyday conversation.

So the learner should know:

• eğer = explicit if
• no eğer
  • conditional verb ending = also very normal Turkish

Yes, it is natural and understandable.

It sounds like a suggestion based on a condition:

• If you get up early tomorrow, we should take a walk together.

A native speaker might also say slightly different versions depending on tone:

• Eğer yarın erken kalkarsan, birlikte yürüyüş yapalım.
  = If you get up early tomorrow, let's go for a walk together.

That version may sound a bit more conversational if the speaker is making a friendly plan.

But your original sentence is still correct and natural.