Ты напрасно волновалась: преподавательница уже прочитала твоё сочинение.

In the past tense, Russian verbs do not show person the way present-tense verbs do. Instead, they agree in gender and number.

So with ты, the past tense can be:

• волновался — if speaking to one male
• волновалась — if speaking to one female

Here, волновалась tells us the speaker is talking to one woman or girl.

This is different from the present tense, where you would get a true second-person form, for example:

• ты волнуешься — you are worried / you worry

It can cover several English ideas depending on context: was worried, got upset, was anxious, was nervous, was fretting.

The verb волноваться often means to worry / to be anxious / to get agitated.

In this sentence, because of the rest of the context, it means something like:

• you were worrying for nothing
• you needn’t have worried

So the exact English wording can vary, but the Russian verb itself is very natural here.

Напрасно means in vain, for nothing, needlessly, or unnecessarily.

In this sentence, it tells us that the worrying was not needed because the teacher had already read the essay.

So Ты напрасно волновалась is basically:

• You worried for nothing
• You needlessly worried
• There was no point in worrying

The colon introduces the reason or explanation for what comes before it.

So the structure is:

• You worried for nothing: the teacher has already read your essay.

The second part explains why the worrying was unnecessary.

In English, a colon works similarly here. In Russian, this punctuation is also very natural when the second clause explains the first.

Преподавательница is a specifically feminine noun meaning female teacher / female instructor / lecturer.

• преподаватель — teacher/instructor, often male, or sometimes gender-neutral in some contexts
• преподавательница — explicitly female teacher

Since the verb is also прочитала (feminine past tense), the sentence clearly tells us the teacher is a woman.

Because it agrees with преподавательница, which is a feminine singular noun.

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

• преподаватель прочитал — the male teacher read
• преподавательница прочитала — the female teacher read

So прочитала matches преподавательница.

This is a question of aspect.

• читать → читала = imperfective
  Focus on the process, repetition, or an uncompleted action
• прочитать → прочитала = perfective
  Focus on the action as completed

Here the meaning is that the teacher has already finished reading the essay. That is why Russian uses the perfective verb прочитала.

So:

• уже прочитала = has already read / already finished reading

If you said читала, it would sound more like was reading or used to read, and it would not express completion as clearly.

Уже means already.

It emphasizes that the action was completed before now, which is exactly why the worrying was unnecessary.

• преподавательница уже прочитала = the teacher has already read

Its position is natural here, before the verb phrase, though Russian word order is flexible.

Because сочинение is a neuter singular noun.

The possessive pronoun твой changes form to match the noun:

• твой — masculine
• твоя — feminine
• твоё — neuter
• твои — plural

Since сочинение is neuter, we get:

• твоё сочинение — your essay/composition

It is in the accusative, but for inanimate neuter singular nouns, the accusative looks the same as the nominative.

So:

• nominative: сочинение
• accusative: сочинение

The verb прочитать takes a direct object, so сочинение is indeed the object here. It just happens that the form does not change.

Often yes, but not always exactly.

Сочинение can mean:

• a school composition
• an essay
• a written piece on an assigned topic

In many learning contexts, essay is the best translation, but composition is sometimes closer, especially in school settings.

Yes. If the speaker were addressing someone formally or more than one person, Russian would use Вы.

For one woman, formally:

• Вы напрасно волновались: преподавательница уже прочитала ваше сочинение.

Notice that with Вы, the past tense is plural:

• волновались

Russian uses plural verb forms with formal Вы, even when speaking to one person.

No, Russian word order is fairly flexible, but the given version is very natural.

The sentence:

• Ты напрасно волновалась: преподавательница уже прочитала твоё сочинение.

sounds neutral and clear.

You could move some words for emphasis, for example:

• Ты волновалась напрасно...
• Преподавательница твоё сочинение уже прочитала.

But the original order is probably the most straightforward for a learner.

Yes. Russian adverbs can often move around.

For example:

• Ты напрасно волновалась.
• Ты волновалась напрасно.

Both are correct. The difference is mostly one of emphasis and style, not core meaning.

The version with напрасно before the verb is very natural and slightly foregrounds the idea of needlessly.