Annem marketten sucuk almış olmalı, çünkü buzdolabında yeni bir paket var.

Because Turkish usually adds possession with a suffix, not a separate word like my.

• anne = mother
• annem = my mother

The -m is the 1st person singular possessive suffix. So instead of saying a separate word for my, Turkish attaches it to the noun.

Marketten means from the market.

It breaks down like this:

• market = market / grocery store
• -ten = from

This suffix is called the ablative ending. It often means from, out of, away from.

So:

• markette = in/at the market
• marketten = from the market

There is no separate word for the here. Turkish often leaves that kind of definiteness unstated unless it really matters.

Because sucuk here is an indefinite direct object: it means something like some sucuk or sucuk in a general sense.

In Turkish, direct objects often work like this:

• sucuk aldı = bought sucuk / bought some sucuk
• sucuğu aldı = bought the sucuk / bought that specific sucuk

So the lack of the accusative ending -ı / -i / -u / -ü tells you the object is non-specific or indefinite.

Almış olmalı means must have bought.

It expresses a deduction about the past. The speaker is not saying they saw the action happen. They are concluding it from evidence.

So this sentence means:

• There is a new package in the fridge.
• Therefore, Mom must have bought sucuk.

This is different from a simple past statement like aldı, which would just mean she bought.

The suffix -mış often suggests indirect knowledge, inference, or a result you notice now.

Compare:

• Annem marketten sucuk aldı. = My mother bought sucuk.
  This sounds like a straightforward fact.
• Annem marketten sucuk almış. = Apparently / it seems my mother bought sucuk.
  This suggests you know it indirectly.
• Annem marketten sucuk almış olmalı. = My mother must have bought sucuk.
  This is a logical conclusion.

In this sentence, the evidence is given right after it: because there is a new package in the fridge.

Not exactly. By itself, -malı / -meli often expresses necessity or should/ought to:

• Annem sucuk almalı. = My mother should buy sucuk.

But when it combines with -mış, as in almış olmalı, it usually means must have and expresses probability/deduction about the past:

• almış olmalı = must have bought

So in this sentence, it is not giving advice or obligation. It is making an inference.

Because the locative ending here appears as -nda, not just -da.

• buzdolabı = refrigerator / fridge
• buzdolabında = in the refrigerator

The extra n is a linking consonant that appears after some noun forms, especially ones that already end in a possessive-type ending or compound form. For a learner, the safest thing is to remember buzdolabında as the normal declined form of buzdolabı.

The important meaning is:

• -da / -de = in, on, at

So buzdolabında means in the fridge.

In Turkish, when bir means a/an, it usually comes after the adjective and before the noun.

So the normal pattern is:

• yeni bir paket = a new package
• güzel bir ev = a beautiful house
• küçük bir araba = a small car

This is the standard word order for an indefinite noun phrase with an adjective.

Var means there is / exists / is present.

So:

• Yeni bir paket var. = There is a new package.

Turkish often uses var and yok for existence:

• var = there is / there are
• yok = there is not / there are not

The sentence buzdolabında yeni bir paket var is literally something like:

• In the fridge, there exists a new package

but in natural English it is just There is a new package in the fridge.

Çünkü means because and introduces the reason for the speaker’s conclusion.

Here the structure is:

• conclusion first: Annem marketten sucuk almış olmalı
• reason after: çünkü buzdolabında yeni bir paket var

This is very natural in Turkish.

If you want to put the reason first, Turkish often prefers a different structure, such as -dığı için:

• Buzdolabında yeni bir paket olduğu için annem marketten sucuk almış olmalı.

So yes, the reason can come first, but you often change the grammar rather than simply moving çünkü.

Because Turkish is usually a verb-final language.

A neutral Turkish clause often puts the verb last:

• Annem marketten sucuk almış olmalı
• subject: Annem
• place/source phrase: marketten
• object: sucuk
• verb phrase: almış olmalı

Likewise in the second clause:

• buzdolabında yeni bir paket var
• the existential verb var comes at the end

Turkish word order is somewhat flexible, but verb at the end is the most basic and common pattern.