Beni aptal sanıyor.

Beni means me.

It comes from the pronoun ben (I) plus the accusative ending -i, giving beni (me as a direct object).

In Beni aptal sanıyor, the speaker is the object of the verb: someone considers / thinks the speaker to be stupid.

Compare:

• ben = I
• beni = me

So beni is not the subject; it is the person being judged.

Turkish often leaves out the subject when it is understood from the verb ending or from context.

In sanıyor, the ending implies he/she/it is thinking/supposing. So the full idea is:

• O beni aptal sanıyor. = He/She thinks I’m stupid.

Usually o is omitted unless you want to emphasize it or avoid confusion.

So the sentence naturally means:

• He thinks I’m stupid
• She thinks I’m stupid

Context tells you which one.

Sanmak usually means to think, suppose, assume, take someone/something for... It is often used when someone has an opinion or impression that may be wrong.

So Beni aptal sanıyor is very natural for:

• He/She thinks I’m stupid
• He/She takes me for a fool
• He/She assumes I’m stupid

Related verbs:

• düşünmek = to think, to consider, to reflect
  More general.
• sanmak = to suppose/assume/think (often based on impression, sometimes mistaken)
• zannetmek = very close to sanmak, often also to suppose/assume mistakenly

In many everyday situations, sanmak and zannetmek can be quite close.

In this sentence, aptal functions like a predicate describing beni.

The pattern is:

• birini + adjective/noun + sanmak

This means:

• to consider someone X
• to think someone is X

So:

• Beni aptal sanıyor = He/She thinks I’m stupid

You do not need aptalım here, because the sentence is not built as He thinks: I am stupid in a separate clause. Instead, it is a compact structure meaning He considers me stupid.

A similar pattern:

• Onu zengin sanıyor. = He thinks he/she is rich.
• Beni doktor sandı. = He thought I was a doctor.

Sanıyor is the present continuous form of sanmak:

• san- = verb stem
• -ıyor = present continuous

So literally it is is thinking / is supposing.

But in Turkish, the present continuous is also often used for current general situations, not just actions happening at this exact moment. So:

• Beni aptal sanıyor can mean
  • He/She thinks I’m stupid
  • He/She believes I’m stupid right now
  • He/She has the impression that I’m stupid

It does not always sound as temporary as English is thinking.

Yes, O beni aptal sanıyor is completely correct.

But Beni aptal sanıyor is also fully correct and very natural.

Turkish often omits subject pronouns because the verb already gives enough information. Adding o can:

• emphasize the subject
• clarify who is being talked about
• contrast with someone else

For example:

• O beni aptal sanıyor, ama sen anlıyorsun.
  He/She thinks I’m stupid, but you understand.

So the version without o is not incomplete; it is just less explicit.

Yes, Turkish word order is flexible, but different orders change emphasis.

The neutral order here is very natural:

• Beni aptal sanıyor.

Other possible orders:

• Aptal sanıyor beni.
  More marked; often poetic, emotional, or conversational with special emphasis.
• Sanıyor beni aptal.
  Also possible in some contexts, but less neutral.

Turkish often puts the most important or focused information before the verb. Since sanıyor is the verb, the words before it can be rearranged for emphasis.

Still, for learners, Beni aptal sanıyor is the best standard model to remember.

Yes, aptal means stupid or dumb, so it is fairly strong and clearly negative.

So Beni aptal sanıyor usually expresses annoyance, insult, or frustration:

• He thinks I’m stupid
• She takes me for an idiot

Depending on tone and context, it can sound angry, hurt, sarcastic, or defensive.

If you wanted a softer adjective, Turkish could use something else, but aptal is definitely insulting.

Common variations:

• Beni aptal sandı. = He/She thought I was stupid.
• Beni aptal sanıyordu. = He/She thought I was stupid / used to think I was stupid.
• Beni aptal sanmıyor. = He/She doesn’t think I’m stupid.
• Beni aptal sanmadı. = He/She didn’t think I was stupid.

This is useful because the same structure stays the same:

• beni = me
• aptal = stupid
• verb changes for tense/negation

Yes. This is a very common pattern.

Structure:

• Birini/bir şeyi + noun/adjective + sanmak

Examples:

• Beni öğretmen sanıyor. = He/She thinks I’m a teacher.
• Onu hasta sanıyorum. = I think he/she is sick.
• Seni mutlu sandım. = I thought you were happy.
• Bunu şaka sandım. = I thought this was a joke.

So Beni aptal sanıyor is a very useful model sentence.

Not by itself.

Sanıyor is singular third person, so it means:

• he/she/it thinks

If you want they think, you need plural:

• Beni aptal sanıyorlar. = They think I’m stupid.

So the ending matters:

• sanıyor = he/she/it thinks
• sanıyorlar = they think

This is due to Turkish vowel harmony and the form of the present continuous suffix.

The suffix is often taught as:

• -iyor / -ıyor / -uyor / -üyor

Which version appears depends on the final vowel of the verb stem.

For sanmak, the stem is san-, and the relevant vowel is a, so the correct form is:

• sanıyor

Similar examples:

• bakmak → bakıyor
• gelmek → geliyor
• bulmak → buluyor
• görmek → görüyor

So sanıyor is the regular harmonic form.