Мне уже не страшно, потому что в комнате горит лампа.

Because Russian often expresses feelings or states with the pattern [dative person] + state word.

So мне страшно literally means something like to me, it is scary, which English naturally translates as I’m scared.

This is very common in Russian:

• мне холодно = I’m cold
• ему грустно = he is sad
• нам интересно = we are interested / it’s interesting to us

So мне is the dative case of я.

Страшно here is not an adverb in the usual English sense. It is a predicative state word (sometimes grouped with short-form words used impersonally).

In this sentence, страшно means scary / frightening, but in the structure мне страшно, the whole phrase means I feel scared.

Compare:

• Это страшно. = That is scary.
• Мне страшно. = I am scared.

So the same word can describe either:

• something objectively frightening, or
• someone’s emotional state.

Because страшно is not agreeing with a noun here.

If you said:

• страшная комната = a scary room

then страшная would be an adjective agreeing with комната (feminine singular).

But in мне уже не страшно, there is no noun being described. Instead, страшно is part of an impersonal expression meaning it is scary / I feel scared. That is why it stays in the form страшно.

Уже usually means already, but in context it often sounds more natural in English as now, anymore, or no longer.

So:

• Мне уже не страшно can mean
  
  • I’m not scared anymore
  • I’m no longer scared
  • I’m not scared now

The idea is that earlier the speaker was scared, but that has changed.

Because не negates the state word страшно.

• Мне страшно = I’m scared
• Мне не страшно = I’m not scared
• Мне уже не страшно = I’m not scared anymore

This is the normal position for negation in this kind of sentence.

Russian often omits the present-tense form of to be.

English says:

• I am scared
• It is scary

Russian usually does not use a present-tense verb equivalent to am / is / are in simple statements like this:

• Мне страшно
• Это страшно

So the present tense is understood without saying a separate verb.

Потому что means because.

Yes, it normally functions as a fixed conjunction introducing a reason:

• Я дома, потому что идёт дождь. = I’m at home because it’s raining.
• Мне уже не страшно, потому что в комнате горит лампа. = I’m not scared anymore because a lamp is on in the room.

Russian also has так как, which can also mean because / since, but потому что is extremely common in everyday speech.

Because потому что introduces a subordinate clause.

Russian punctuation regularly uses a comma before conjunctions like потому что when one clause depends on another:

• Мне уже не страшно, потому что в комнате горит лампа.

This is similar to English, where a comma may appear before because in some cases, though Russian punctuation is more rule-based here.

Because в + prepositional case is used to mean in a place.

The noun комната becomes в комнате in the prepositional case:

• комната = room
• в комнате = in the room

This is a very common pattern:

• в доме = in the house
• в школе = at school / in the school
• в машине = in the car

Yes, гореть literally means to burn, but in Russian it is also commonly used for lights that are on / shining / lit.

So:

• горит лампа = the lamp is on / lit
• горит свет = the light is on

This is a very natural Russian way to talk about a light source. English usually does not say the lamp burns, but Russian does.

Sometimes, but the meaning would shift a little.

• горит лампа focuses on the fact that the lamp is on / lit
• светит лампа focuses more on the fact that the lamp is giving light / shining

In this sentence, горит лампа is the most natural choice because the important idea is that the lamp is on, which explains why the speaker is no longer scared.

Yes, лампа горит is also grammatically correct.

Russian word order is more flexible than English. The version in your sentence:

• в комнате горит лампа

sounds natural because it presents the setting first (in the room) and then introduces what is there / happening (a lamp is burning / is on).

Compare:

• В комнате горит лампа. = In the room, a lamp is on.
• Лампа горит в комнате. = The lamp is on in the room.

Both are possible, but the first sounds more natural in this context.

Yes. Лампа is the grammatical subject, and горит is the verb.

You can tell because лампа is in the nominative case, and the verb agrees with it:

• лампа = singular
• горит = 3rd person singular

If it were plural:

• В комнате горят лампы. = Lamps are on in the room.

Because the subject лампа is singular feminine, and in the present tense Russian verbs agree with the subject in number and person.

In the present tense, gender does not show on the verb, but number does:

• лампа горит = the lamp is on
• лампы горят = the lamps are on

So горит is the correct singular form.

Yes, that is closer to the Russian structure, and it can help you understand the grammar.

A very literal breakdown would be:

• Мне = to me
• уже = already
• не страшно = not scary
• потому что = because
• в комнате = in the room
• горит = burns / is lit
• лампа = lamp

But for natural English, you would say:

• I’m not scared anymore, because there’s a lamp on in the room.
• or I’m no longer scared, because the lamp is on in the room.

Yes. The sentence sounds very natural spoken Russian.

In particular:

• мне страшно / мне не страшно is a very everyday way to express fear
• уже не is a common way to say no longer / not anymore
• горит лампа is a normal Russian way to say a lamp is on

So although some parts are structured differently from English, the sentence as a whole is idiomatic and natural.

Yes, Russian word order is flexible, but the nuance may shift slightly.

Common options include:

• Мне уже не страшно
• Мне не страшно уже

The first is more neutral and natural in most contexts. It smoothly emphasizes the change of state: I’m not scared anymore.

The second is possible, but can sound more conversational or more strongly focused on already / anymore depending on intonation.

Yes, if the location were already clear from context.

For example:

• Мне уже не страшно, потому что горит лампа.

This would mean I’m not scared anymore, because a lamp is on.

But в комнате makes the image clearer and explains why the speaker feels safer: the room itself is lit.