Neden mutsuz görünüyorsun?

• neden = why
• mutsuz = unhappy
• görünüyorsun = you look / you appear

So the whole sentence means Why do you look unhappy?

A more literal translation would be something like Why are you appearing unhappy?, but in natural English we usually say Why do you look unhappy?

Because these come from two different verbs:

• görmek = to see
• görünmek = to appear, to be seen, to look

So:

• görüyorsun = you see
• görünüyorsun = you appear / you look

In this sentence, Turkish uses görünmek because the idea is about someone’s appearance or visible mood, not about the act of seeing.

It can be broken down like this:

• görün- = verb stem from görünmek
• -üyor = present continuous suffix here
• -sun = you (2nd person singular)

So:

görün + üyor + sun → görünüyorsun

This gives the meaning you are appearing / you are looking.

The -yor form is the Turkish present continuous, and it is very commonly used for what someone is doing or seeming right now.

So mutsuz görünüyorsun means something like:

• you look unhappy
• you seem unhappy right now

In English we often use the simple form look, but Turkish naturally uses the present continuous here.

The present continuous suffix is basically -(I)yor. The vowel changes according to vowel harmony.

Since the last vowel in görün- is ü, the suffix appears as -üyor:

• görünmek → görünüyor
• görünüyorsun

So this is a normal vowel harmony pattern in Turkish.

Because Turkish usually does not need subject pronouns when the verb already shows the person.

Here, -sun already tells you the subject is you (singular).

So:

• Neden mutsuz görünüyorsun? = Why do you look unhappy?
• Sen neden mutsuz görünüyorsun? = also possible, but sen adds emphasis

Turkish often leaves out sen unless it wants contrast, emphasis, or clarity.

Because this is a question-word question, not a yes/no question.

Turkish uses mi / mı / mu / mü for yes/no questions, such as:

• Mutsuz görünüyorsun. = You look unhappy.
• Mutsuz görünüyor musun? = not natural for this meaning, but structurally this shows how mu makes a yes/no question

But when you already have a question word like:

• neden = why
• ne = what
• kim = who
• nerede = where

you do not use mi.

So Neden mutsuz görünüyorsun? is complete as it is.

Not completely. Turkish word order is flexible, but this version is the most natural and neutral.

• Neden mutsuz görünüyorsun? = natural, neutral
• Sen neden mutsuz görünüyorsun? = also natural, with emphasis on you

The main idea is that neden introduces the reason-question, and mutsuz görünüyorsun is the thing being asked about.

If you move words around, the sentence may still be grammatical, but the emphasis can change.

Yes. All three can mean why:

• neden = neutral, very common
• niye = more conversational
• niçin = also common, sometimes a little more formal or written

So these are all possible:

• Neden mutsuz görünüyorsun?
• Niye mutsuz görünüyorsun?
• Niçin mutsuz görünüyorsun?

The first one is a very safe, standard choice.

It is singular informal, because of -sun.

• görünüyorsun = you singular informal

If you want plural or polite/formal you, use:

• Neden mutsuz görünüyorsunuz?

So:

• görünüyorsun = you look
• görünüyorsunuz = you look (plural or polite)

No. Turkish adjectives do not change for person, number, or gender.

So mutsuz stays the same:

• Ben mutsuz görünüyorum. = I look unhappy.
• Sen mutsuz görünüyorsun. = You look unhappy.
• O mutsuz görünüyor. = He/she looks unhappy.
• Onlar mutsuz görünüyorlar. = They look unhappy.

The adjective mutsuz does not change form.

Not exactly.

• mutsuz = unhappy, not happy, emotionally low, dissatisfied
• üzgün = sad, upset

So:

• Neden mutsuz görünüyorsun? = Why do you look unhappy?
• Neden üzgün görünüyorsun? = Why do you look sad?

There is overlap, but mutsuz is a bit broader than üzgün.

Yes. That is a very good translation too.

Because görünmek can mean:

• to look
• to appear
• to seem

So depending on context, Neden mutsuz görünüyorsun? can be understood as:

• Why do you look unhappy?
• Why do you seem unhappy?

In everyday English, look unhappy is usually the most natural translation.