Film bitince ben eve döneceğim.

Bitince comes from the verb bitmek, meaning to finish / to end.

It is built like this:

• bit- = verb stem
• -ince = a suffix meaning when, once, or sometimes after

So film bitince means when the film ends or when the film is over.

This -ince form is very common in Turkish for linking actions in time.

Because Turkish often expresses ideas like when, after, or while by adding suffixes to verbs instead of using separate conjunction words.

So instead of saying something like:

• when the film finishes

Turkish can simply say:

• film bitince

This is a very normal Turkish pattern.

No. In this sentence, film is the subject of bitince.

The idea is:

• the film ends
• then I will return home

So the film is the thing that is ending. That is why film appears in its basic form, not with an object ending.

That is correct: Turkish often leaves out subject pronouns when they are already clear from the verb ending.

So this sentence could also be:

• Film bitince eve döneceğim.

That already means I will return home when the film ends, because -ceğim shows first person singular.

Ben is included for reasons like:

• emphasis
• clarity
• contrast with someone else

So ben is not required, but it is perfectly natural.

Because eve uses the dative case, which often marks movement toward something.

• ev = house / home
• eve = to the house / homeward
• evde = at home / in the house

Since the verb is about returning to home, Turkish uses eve.

Döneceğim comes from dönmek, which can mean to turn, to return, or to go back, depending on context.

It is formed like this:

• dön- = verb stem
• -ecek = future tense suffix
• -im = first person singular ending

So the underlying structure is roughly:

• dön-ecek-im

In actual spelling and pronunciation, this becomes:

• döneceğim

Meaning:

• I will return
• I will go back

This happens because of a common sound/spelling change in Turkish.

The future suffix is -ecek / -acak. When a personal ending beginning with a vowel is added, the final k often softens to ğ.

So:

• dönecek + im becomes döneceğim

The ğ in Turkish is usually not pronounced like a strong English g. It often:

• lengthens the vowel before it, or
• creates a very slight glide

So döneceğim does not sound like a hard g word.

The main verb döneceğim is in the future tense:

• I will return

The form bitince is not a tense in the same way; it is a time-linking verb form meaning something like:

• when it ends
• once it is over

So the sentence combines:

• a time clause: film bitince
• a main future action: ben eve döneceğim

This sentence is very natural Turkish word order.

A simple way to look at it is:

• Film bitince = time clause first
• ben eve döneceğim = main clause

Inside the main clause, Turkish often places the verb at the end:

• subject: ben
• destination: eve
• verb: döneceğim

So the whole structure is very typical for Turkish.

Yes, absolutely.

You can say:

• Film bitince eve döneceğim.

This is probably the more neutral version in everyday Turkish.

Adding ben makes the subject more explicit, but it is not necessary.

Yes. That is also correct.

There is a small difference in feel:

• Film bitince = when the film ends / once the film is over
• Film bittikten sonra = after the film has ended

Both are natural.
Often:

• -ince feels a bit more compact and immediate
• -dikten sonra feels a bit more explicitly after that point

In many everyday contexts, either one works.

No. Dönmek can have several related meanings, such as:

• to turn
• to rotate
• to come back
• to return
• to go back

The exact meaning depends on context.

Here, because of eve meaning to home, the meaning is clearly:

• to return home
• to go back home