Anneannem gelmeden kahveyi içmiyorum.

Anneannem means my maternal grandmother — literally, my mother's mother.

Turkish distinguishes:

• anneanne = maternal grandmother
• babaanne = paternal grandmother

So this is more specific than English grandma/grandmother.

It breaks down like this:

• anneanne = maternal grandmother
• -m = my

So:

• anneannem = my maternal grandmother

This is a normal Turkish possessive pattern. Turkish often adds possession directly to the noun rather than using a separate word like my.

Gelmeden comes from:

• gel- = come
• -meden / -madan = without doing, and in many contexts before doing

So anneannem gelmeden literally means something like:

• without my grandmother coming
• or before my grandmother comes

In this sentence, the natural English meaning is usually before my grandmother comes.

This is a very common question.

By itself, -meden often means before or without. But when the main clause is negative, English often translates the whole idea as until.

So:

• Anneannem gelmeden kahveyi içmiyorum.

literally: I do not drink the coffee before my grandmother comes.

natural English: I don't drink the coffee until my grandmother comes.

So Turkish is using a negative verb + -meden clause, where English often prefers until.

The -yi is the accusative case marker. It usually shows that the direct object is specific or definite.

• kahve = coffee
• kahveyi = the coffee / that coffee / coffee as a specific item

So:

• kahve içmiyorum = I don't drink coffee / I'm not drinking coffee
• kahveyi içmiyorum = I'm not drinking the coffee

In your sentence, kahveyi suggests a particular coffee, not coffee in general.

It can be analyzed like this:

• iç- = drink
• -me- = negation
• -yor = present continuous / ongoing present
• -um = I

So içmiyorum means:

• I am not drinking
• or sometimes I don't drink, depending on context

Because of sound changes before -yor, the negative part appears as mi in spelling:

• iç-me-yor-um → içmiyorum

Because Turkish usually does not need a separate subject pronoun when the verb already shows the person.

In içmiyorum, the ending -um already tells you the subject is I.

So:

• (Ben) kahveyi içmiyorum.
• Kahveyi içmiyorum.

Both can mean I am not drinking the coffee.

Ben is optional and is usually added only for emphasis, contrast, or clarity.

Formally, yes: it uses -yor, the present continuous marker.

But in Turkish, -yor is used quite broadly. Depending on context, it can mean:

• something happening right now
• a current state or decision
• sometimes a habitual action in everyday speech

So here, içmiyorum could mean something like:

• I'm not drinking the coffee before/until my grandmother comes
• I don't drink the coffee before/until my grandmother comes

The exact English tense depends on context, but the Turkish form is completely natural.

No, Turkish word order is flexible, although this version is very natural.

The sentence you have is:

• Anneannem gelmeden kahveyi içmiyorum.

This puts the time clause first, then the object, then the verb. That is a very common pattern.

You could also hear:

• Kahveyi anneannem gelmeden içmiyorum.

This is also grammatical, but it shifts the focus slightly toward kahveyi.

The verb usually stays at the end, which is the most important word-order rule here.

Yes. You can say:

• Anneannem gelmeden önce kahveyi içmiyorum.

Here, önce explicitly adds the sense of before.

Compare:

• gelmeden = before coming / without coming
• gelmeden önce = before coming

Both are possible. In many sentences, gelmeden alone already works well, especially when the meaning is clear from context.

The subject is understood from the noun placed before it:

• Anneannem gelmeden = before my grandmother comes

Unlike a fully conjugated verb, gelmeden does not show person the way geliyor, geldim, etc. do. So Turkish often names the subject directly if needed.

That is why anneannem appears there: it tells you who is doing the coming.