Bana kalırsa yarın gitmeliyiz.

Literally, bana kalırsa is something like if it is left to me or if it depends on me.

As a whole, though, it is an idiomatic expression, and in normal English it usually means in my opinion, as far as I’m concerned, or if you ask me.

So this is a case where the overall meaning is more important than a word-for-word translation.

Bana is the dative form of ben (I / me).

• ben = I
• bana = to me

In this expression, Turkish uses the idea of something being left to someone, so the dative case is used: to me.

This is why you get bana kalırsa, not ben kalırsa.

Also note that ben changes irregularly in some case forms:

• ben
• bana
• beni
• bende
• benden

Kalırsa comes from the verb kalmak, which usually means to stay, to remain, or to be left.

It breaks down like this:

• kal- = verb stem
• -ır = aorist suffix
• -sa = conditional suffix, meaning if

So:

• kalır = it stays / it remains
• kalırsa = if it stays / if it remains

In bana kalırsa, the phrase is idiomatic, so you should think of the whole expression rather than translating each piece too mechanically.

They are very similar, but not exactly identical in tone.

• bence = in my opinion
• bana göre = according to me / in my view
• bana kalırsa = if you ask me / if it were up to me / in my opinion

Bence is probably the most common and straightforward way to say in my opinion.

Bana kalırsa can sound a little more personal or slightly stronger, as if you are giving your own judgment more directly.

So in many situations they can translate the same way, but the nuance is a bit different.

Gitmeliyiz breaks down into:

• git- = go
• -meli = should / must / need to
• -yiz = we are / we ending

So gitmeliyiz means we should go or sometimes we must go, depending on context.

A few useful details:

• The suffix is -meli / -malı, depending on vowel harmony.
• Here it is -meli because git- contains the front vowel i.
• The y is a buffer consonant connecting the endings smoothly.

Not always. It expresses necessity, but the exact English translation depends on context.

It can mean:

• should
• ought to
• must
• need to

In yarın gitmeliyiz, we should go tomorrow is usually the most natural translation.

But in a stronger context, it could feel closer to we must go tomorrow.

So -meli/-malı covers a range from recommendation to obligation.

Because Turkish verbs usually show the subject with their endings.

In gitmeliyiz, the ending -yiz already tells you the subject is we.

So Turkish often does not need a separate pronoun:

• gitmeliyiz = we should go

You can add biz if you want emphasis or contrast:

• Biz yarın gitmeliyiz. = We should go tomorrow.
  This might suggest we, not someone else.

So leaving out the pronoun is normal and natural.

Because yarın is functioning as a time adverb: tomorrow.

In Turkish, many time expressions can be used directly without a case ending:

• bugün = today
• yarın = tomorrow
• dün = yesterday

So:

• yarın gitmeliyiz = we should go tomorrow

You do not need an extra suffix here.

No, Turkish word order is fairly flexible, although some orders sound more neutral than others.

Bana kalırsa yarın gitmeliyiz is a very natural, neutral sentence.

Why this order works well:

• Bana kalırsa sets up the speaker’s opinion first.
• yarın gives the time.
• gitmeliyiz comes at the end, where the main verb often goes in Turkish.

Other orders are possible, but they may sound more marked or place emphasis on different parts:

• Yarın gitmeliyiz, bana kalırsa.
• Bana kalırsa gitmeliyiz yarın.

These are not impossible, but the original version is the most natural everyday order.

These forms express different ideas:

• gitmeliyiz = we should go / we must go
• gidelim = let’s go
• gideceğiz = we will go

So:

• gitmeliyiz gives advice, necessity, or obligation
• gidelim makes a suggestion
• gideceğiz simply states a future action

That means yarın gitmeliyiz is not just talking about the future. It is saying that going tomorrow is the right or necessary thing to do.