Не мешай мне сосредоточиться, пожалуйста.

Please don’t disturb me; let me concentrate.

Breakdown of Не мешай мне сосредоточиться, пожалуйста.

• не: not
• мне: me
• пожалуйста: please
• сосредоточиться: to concentrate
• мешать: to keep from

Questions & Answers about Не мешай мне сосредоточиться, пожалуйста.

Why is it мешай and not мешайте?

Мешай is the informal singular imperative, used when speaking to one person you address as ты.
Мешайте is the polite/formal or plural imperative, used with вы or when speaking to more than one person.

So:

• Не мешай мне сосредоточиться, пожалуйста. = to a friend / someone you address as ты
• Не мешайте мне сосредоточиться, пожалуйста. = to a stranger / superior / group

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How does the negative imperative work here? Is не мешай the normal way to say “don’t …”?

Yes. Russian forms “don’t do X” by putting не before the imperative:

• мешай (imperative) → не мешай (negative imperative)

This is the standard structure for prohibitions/requests not to do something.

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Why is it мне and not меня? What case is мне?

Мне is dative case of я (“to me / for me”). The verb мешать commonly takes the person being hindered in the dative: мешать кому.

So:

• мешать мне = “to hinder/interrupt me” Not мешать меня (that would be ungrammatical in standard Russian).

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What does сосредоточиться mean grammatically—why is it an infinitive?

Сосредоточиться is an infinitive (“to concentrate / to focus”). After мешать, Russian often uses an infinitive to express what action is being prevented:

• Не мешай мне сосредоточиться = “Don’t hinder me (from) concentrating.”

You can think of it as “Don’t interfere with my ability to concentrate.”

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Why is сосредоточиться perfective? Could it be сосредотачиваться instead?

Сосредоточиться is perfective, typically focusing on achieving focus (getting into a concentrated state).
Сосредотачиваться is imperfective, focusing on the process/ongoing activity of concentrating.

Both can work, but the nuance changes:

• Не мешай мне сосредоточиться = don’t prevent me from managing to focus / getting focused right now.
• Не мешай мне сосредотачиваться = don’t interrupt me while I’m in the process of concentrating / trying to concentrate repeatedly.

In many everyday situations, the perfective сосредоточиться sounds very natural.

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What does the -ся / -сь in сосредоточиться mean?

-ся marks a reflexive verb form. With сосредоточиться, it’s not “to concentrate oneself” in a literal English way, but it signals that the action is directed toward one’s own state: “to focus (oneself), to concentrate.”

Many Russian verbs use -ся to form meanings like “get into a state” or “do something to oneself,” and сосредоточиться is one of them.

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Where is the stress in these words? (I keep mispronouncing them.)

Common stresses in this sentence:

• меша́й (me-SHAY) — stress on the second syllable
• мне (mnye) — one syllable
• сосредото́читься (sa-sri-da-TO-chit-sa) — stress on -то́-
• пожа́луйста (pa-ZHA-lus-ta) — stress on -жа́-

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Why is there a comma before пожалуйста? Can пожалуйста go elsewhere?

Пожалуйста functions like a parenthetical politeness marker (“please”), so it’s often set off by commas.

Yes, it can move:

• Пожалуйста, не мешай мне сосредоточиться.
• Не мешай, пожалуйста, мне сосредоточиться.
• Не мешай мне сосредоточиться, пожалуйста. (your sentence)

All are correct; the placement changes emphasis slightly (front placement can sound a bit more politely framed).

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Can I drop мне? What changes?

You can, but the meaning becomes less explicit:

• Не мешай сосредоточиться, пожалуйста. = “Don’t stop (me/us) from concentrating, please.”

Without мне, it can sound more general or context-dependent (who is concentrating is inferred). Including мне makes it clearly personal: “Don’t disturb me.”

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Is мешать the best verb here? How is it different from отвлекать?

They overlap but aren’t identical:

• мешать = “to hinder / interfere / get in the way,” broader (noise, talking, actions that prevent you from doing something)
• отвлекать = “to distract,” specifically pulling attention away

So:

• Не мешай мне сосредоточиться = don’t interfere with my focusing (stop bothering me)
• Не отвлекай меня / Не отвлекай меня от работы = don’t distract me (don’t draw my attention away)

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How strong does Не мешай… sound—rude, neutral, or polite?

By itself, Не мешай… can sound fairly direct (like “Don’t bother me”). Adding пожалуйста softens it into a more polite request.

If you want it softer still, you might add mitigating words:

• Не мешай мне, пожалуйста.
• Пожалуйста, не мешай мне сосредоточиться.
• Не мог(ла) бы ты не мешать мне сосредоточиться? (more polite/indirect)

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If I want to address a group or be formal, do I change anything besides мешай → мешайте?

Mostly that’s the key change:

• Не мешайте мне сосредоточиться, пожалуйста.

Everything else can stay the same. You may also choose slightly more formal wording, but grammatically the sentence is already fine with мешайте.

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If I want to say what I’m concentrating on, how do I add that?

Сосредоточиться commonly takes на + prepositional (“to focus on”):

• Не мешай мне сосредоточиться на работе, пожалуйста. = “Don’t disturb me so I can focus on work, please.”
• …на задаче / на тексте / на разговоре etc.