Я оставила пометку в черновике, чтобы потом перепроверить даты и адрес.

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

• оставил = masculine singular
• оставила = feminine singular
• оставило = neuter singular
• оставили = plural

So Я оставила tells you that the speaker is female. If the speaker were male, it would be Я оставил.

Because it is the direct object of the verb оставила. In Russian, a feminine noun like пометка usually changes to the accusative singular form пометку when it is the thing being acted on.

Here:

• пометка = nominative singular
• пометку = accusative singular

So оставила пометку means left a note/mark/comment.

Here в черновике means in the draft or in the rough copy, expressing location.

After в, Russian uses different cases depending on meaning:

• в + accusative = motion into something
• в + prepositional = location in something

So:

• в черновик would suggest movement into the draft
• в черновике means inside/in the draft

Because the note is located in the draft, Russian uses the prepositional case: черновике.

Черновик usually means a draft, rough copy, or a working version of a text/document. It is something not yet final.

So в черновике can mean:

• in the draft document
• in the rough version
• in the notes version rather than the final copy

Depending on context, it might be a written draft, a digital draft, or even a rough working file.

Чтобы introduces a clause of purpose. It often corresponds to English so that, in order to, or sometimes just to.

In this sentence:

• Я оставила пометку в черновике, чтобы потом перепроверить даты и адрес.

The idea is:

• I left a note in the draft so that I could check the dates and address again later
• or more naturally in English, I left a note in the draft to double-check the dates and address later

So чтобы shows why the speaker left the note.

That is very common when the subject of both actions is the same.

Here, the same person:

• left the note
• will double-check later

So Russian can use чтобы + infinitive:

• чтобы перепроверить

If the subject were different, Russian would more often use a finite verb form, for example:

• Я оставила пометку, чтобы он перепроверил даты.
• I left a note so that he would double-check the dates.

So in your sentence, the infinitive works because the person doing both actions is the same speaker.

The prefix пере- often adds the idea of again, re-, or over.

So:

• проверить = to check
• перепроверить = to check again, re-check, double-check

It suggests a repeated or extra careful check. In this sentence, перепроверить is stronger than just проверить: the speaker wants to verify the dates and address again to make sure they are correct.

Перепроверить is a perfective verb. Perfective verbs present an action as a whole, often with emphasis on completion or result.

After чтобы, Russian often uses the perfective infinitive when talking about a specific intended result:

• чтобы перепроверить = in order to complete a re-check

If you used the imperfective перепроверять, it would sound less natural here unless you wanted to stress an ongoing or repeated process.

So перепроверить fits well because the speaker means one purposeful completed action: to double-check the dates and address.

Потом means later / afterwards. It modifies the purpose clause and tells you when the speaker plans to do the checking.

Russian word order is fairly flexible, so потом can move around, but its current position is very natural:

• чтобы потом перепроверить даты и адрес

This puts the time idea right before the action. It sounds smooth and emphasizes that the double-checking will happen later, not immediately.

You could also hear variants like:

• чтобы перепроверить потом даты и адрес

but the original order is more natural in neutral speech.

That is just the meaning of the sentence: there are multiple dates but only one address.

Both nouns are direct objects of перепроверить, so they are in the accusative case. But for these nouns, the accusative looks like the nominative because they are inanimate:

• даты = nominative plural / accusative plural
• адрес = nominative singular / accusative singular

So the forms do not change visibly here, even though grammatically they are objects.

Yes, Russian could omit Я if the subject is clear from context:

• Оставила пометку в черновике, чтобы потом перепроверить даты и адрес.

Because оставила already shows first person singular feminine, the listener can often understand who the subject is.

However, Я is perfectly normal too. Including it can:

• make the sentence clearer out of context
• add slight emphasis on I
• sound more natural in some situations, especially in isolation

So both are possible, but with no surrounding context, keeping Я is very natural.

Not exactly. Пометка usually means a mark, note, annotation, or small reminder added to something. It often sounds practical and brief.

Compared with similar words:

• пометка = a note/mark/annotation, often short and functional
• заметка = a note, but can also mean a written note or even a short article depending on context
• комментарий = a comment, often more explicit or explanatory

So оставила пометку в черновике suggests the speaker added a small reminder or annotation in the draft for later checking.

Yes, Russian word order is flexible, and the core meaning would stay mostly the same, but the focus or emphasis might shift.

For example:

• Я оставила пометку в черновике, чтобы потом перепроверить даты и адрес.
  Neutral, natural order.

• В черновике я оставила пометку, чтобы потом перепроверить даты и адрес.
  Slightly emphasizes where the note was left.

• Я оставила в черновике пометку, чтобы потом перепроверить даты и адрес.
  Also natural; a slightly different rhythm.

So the original sentence is a standard neutral version, but other orders are possible depending on what the speaker wants to highlight.