Cumartesi sinemaya gitmeden önce kardeşimle kahve içeceğim.

Because cumartesi can function like a time expression by itself, meaning on Saturday.

In Turkish, many time words do not need a preposition like on, at, or in:

• Cumartesi = on Saturday
• Yarın = tomorrow
• Sabah = in the morning

So:

• Cumartesi sinemaya gitmeden önce...
  = Before going to the cinema on Saturday...

Also, unlike English, days of the week are normally not capitalized in Turkish unless they begin the sentence.

Because gitmek usually takes a destination with the dative ending, which often corresponds to to in English.

• sinema = cinema / movie theater
• sinemaya = to the cinema

The ending here is -(y)A, the dative case:

• ev → eve = to the house
• okul → okula = to school
• sinema → sinemaya = to the cinema

The y is a buffer consonant added because sinema ends in a vowel.

Gitmeden önce is a very common Turkish structure meaning before going or before (someone) goes, depending on context.

It is built like this:

• git- = go
• -meden / -madan = without doing / before doing in some fixed expressions
• önce = before

So:

• gitmeden önce = before going / before I go / before going there

In this sentence, it naturally means:

• before going to the cinema

This structure is very common:

• Yemek yemeden önce = before eating
• Uyumadan önce = before sleeping
• Dışarı çıkmadan önce = before going out

Even though English often needs a subject like before I go, Turkish often leaves that to context.

Because kardeşim means my sibling / my brother / my sister, while kardeş just means sibling in a general sense.

Breakdown:

• kardeş = sibling
• kardeş-im = my sibling
• kardeşim-le = with my sibling

The -le / -la ending means with.

So:

• kardeşimle = with my sibling

The speaker is saying specifically with my sibling, not just with a sibling.

-le / -la is the suffix meaning with.

Examples:

• arkadaşımla = with my friend
• annemle = with my mother
• otobüsle = by bus / with the bus
• kalemle = with a pen

So:

• kardeşimle kahve içeceğim = I will drink coffee with my sibling

The form changes by vowel harmony:

• -le
• -la

And after some words it can also appear in the separate-looking form ile, though -le/-la is very common in everyday Turkish.

Because Turkish normally places the main verb at or near the end of the sentence.

This is one of the biggest word-order differences from English.

English:

• I will drink coffee with my sibling before going to the cinema on Saturday.

Turkish:

• Cumartesi sinemaya gitmeden önce kardeşimle kahve içeceğim.

A rough pattern in Turkish is:

time + place/direction + other information + object + verb

This is not absolutely fixed, but the verb-final pattern is very common and natural.

İçeceğim is the future tense, 1st person singular: I will drink.

Breakdown:

• iç- = drink
• -ecek / -acak = future tense
• -im / -ım / -um / -üm (with sound changes) = I

So:

• iç + ecek + im → içeceğim

The spelling and pronunciation change a little because of normal Turkish sound patterns.

Similar examples:

• gideceğim = I will go
• yapacağım = I will do / make
• göreceğim = I will see

Because Turkish often drops subject pronouns when the verb already shows who the subject is.

• içeceğim already means I will drink
• So ben is not necessary

You could say:

• Ben cumartesi sinemaya gitmeden önce kardeşimle kahve içeceğim.

But usually ben is only added for emphasis, contrast, or clarity.

For example:

• Ben kahve içeceğim, o çay içecek.
  = I will drink coffee, and he/she will drink tea.

It can mean either one.

Kardeş is gender-neutral and means sibling. Depending on context, it may refer to:

• younger brother
• younger sister
• sibling in general

If Turkish speakers want to be more specific, they can say:

• erkek kardeş = brother
• kız kardeş = sister

So kardeşimle is best understood as with my sibling, unless the context makes the gender clear.

Yes, it is completely natural.

• kahve = coffee
• içmek = to drink

So:

• kahve içmek = to drink coffee

This is the normal verb used for beverages in Turkish:

• çay içmek = to drink tea
• su içmek = to drink water
• kahve içeceğim = I will drink coffee

Yes, the exact subject is often understood from context.

By itself, gitmeden önce does not clearly mark the subject. It just means before going / before someone goes.

In this sentence, because the main verb is içeceğim (I will drink), the most natural reading is:

• Before I go to the cinema on Saturday, I will drink coffee with my sibling.

But in other contexts, Turkish can make the subject clearer if needed.

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

The original sentence is very natural:

• Cumartesi sinemaya gitmeden önce kardeşimle kahve içeceğim.

You could also say:

• Kardeşimle cumartesi sinemaya gitmeden önce kahve içeceğim.
• Kahve içeceğim cumartesi sinemaya gitmeden önce kardeşimle.

But these alternatives may sound more marked, more emphatic, or less neutral.

The original version is a good standard pattern because it moves from time/context toward the final verb.

Very often, yes, in this kind of structure.

Common pattern:

verb + -madan/-meden + önce

Examples:

• Çıkmadan önce = before leaving
• Yatmadan önce = before going to bed
• Aramadan önce = before calling

So:

• gitmeden önce = before going

You can think of it as a set phrase that learners should get used to as a whole pattern.

The spelling is regular in Turkish, but the pronunciation may feel unfamiliar to English speakers.

• gitmeden is spelled exactly with git-me-den
• Turkish pronunciation is usually very close to spelling
• Each vowel is pronounced clearly

A rough English-friendly approximation is:

• geet-meh-den

But it is better to learn it as Turkish sounds rather than forcing English pronunciation onto it.

The important grammar point is that -meden is the suffix here, attached to git-.

A simple breakdown is:

• Cumartesi = on Saturday
• sinemaya = to the cinema
• gitmeden önce = before going
• kardeşimle = with my sibling
• kahve = coffee
• içeceğim = I will drink

So the structure is roughly:

[Time] + [Destination] + [Before doing X] + [Companion] + [Object] + [Verb]

This kind of breakdown is very helpful when reading longer Turkish sentences.