Я отвернулся от окна, потому что солнце светило слишком ярко.

Because отвернуться от + Genitive means to turn away from something.

• отвернул = turned something, or turned away in a different structure
• отвернулся = turned away himself / turned away

In this sentence, the speaker changes his own direction, so Russian uses отвернуться.

Compare:

• Я отвернул голову. = I turned my head.
• Я отвернулся от окна. = I turned away from the window.

The -ся is part of the verb here and helps create that meaning of turning oneself away.

The -ся is a common Russian verb ending that often makes a verb reflexive or changes its meaning.

Here, отвернуться is the normal dictionary form for to turn away. It is not just a literal English-style reflexive like turn myself; it is simply the standard Russian verb used in this situation.

So learners should treat:

• отвернуть
• отвернуться

as related but different verbs with different uses.

Because the preposition от requires the genitive case when it means from or away from.

So:

• окно = nominative
• окна = genitive

That is why the sentence has:

• от окна = away from the window

This is a very common pattern:

• от дома = from the house
• от стола = away from the table
• от окна = away from the window

Because Russian case forms often overlap.

For окно, the form окна can mean either:

• genitive singular: of the window / from the window
• nominative plural: windows

In this sentence, it must be genitive singular because it follows от.

So the grammar of the sentence tells you which meaning is correct.

Because солнце is a neuter noun in Russian.

In the past tense, Russian verbs agree with gender and number:

• masculine: светил
• feminine: светила
• neuter: светило
• plural: светили

Since солнце is neuter, the verb must be светило.

Yes. It tells us the speaker is male, or at least the sentence is written in the masculine past tense.

In Russian past tense:

• я отвернулся = I turned away said by a man
• я отвернулась = I turned away said by a woman

So Russian past tense often reveals the gender of the speaker.

Because ярко is an adverb, and it modifies the verb светило.

The sentence is describing how the sun was shining:

• светило как? → ярко = brightly

If you used яркий / яркое, those would be adjectives, and they would describe a noun instead.

Compare:

• яркое солнце = a bright sun
• солнце светило ярко = the sun was shining brightly

This is an important difference.

• очень ярко = very brightly
• слишком ярко = too brightly

So слишком suggests excess—more than is comfortable, desirable, or appropriate.

That matters here, because the speaker turned away because the sunlight was uncomfortably bright.

потому что is one of the most common ways to say because in Russian.

So:

• Я отвернулся от окна, потому что солнце светило слишком ярко.
• I turned away from the window because the sun was shining too brightly.

It introduces the reason.

Other Russian ways to express cause exist, such as так как, but потому что is very common, neutral, and natural in everyday speech.

Yes, Russian word order is fairly flexible, although some orders sound more neutral than others.

The given sentence is a normal, neutral way to say it:

• Я отвернулся от окна, потому что солнце светило слишком ярко.

You could also say:

• Потому что солнце светило слишком ярко, я отвернулся от окна.

That puts more emphasis on the reason first.

You could even shift smaller parts for emphasis, but not every order sounds equally natural in every context. The original version is probably the safest and most standard for a learner.

Because потому что introduces a subordinate clause.

Russian punctuation normally uses a comma before subordinate conjunctions like this.

So the sentence has:

• main clause: Я отвернулся от окна
• subordinate clause of reason: потому что солнце светило слишком ярко

That is why there is a comma between them.

Often, but not always. светить can mean things like:

• to shine
• to give light
• to illuminate

In this sentence, солнце светило is naturally translated as the sun was shining.

So shine is the best English equivalent here, but the exact translation depends on context.

Because the speaker is describing a completed situation in the past:

• first, the sun was shining too brightly
• because of that, the speaker turned away

Russian past tense is formed differently from English: it does not use a separate word like did or was for simple past in this kind of sentence. Instead, the verb itself takes a past form:

• отвернулся
• светило

So the sentence naturally tells a past event or past situation.

They are related, but not the same.

• повернуться = to turn / to turn around
• отвернуться = to turn away

The prefix от- adds the idea of moving away from something.

So in this sentence, отвернулся от окна specifically means the speaker turned away from the window, not just turned in some direction.

Usually it is understood literally here: the speaker physically turned away from the window.

But Russian, like English, can also use this kind of phrase in slightly broader ways depending on context. In this specific sentence, though, the most natural interpretation is physical movement away from the direction of the window because of the bright sun.