Я перечитал правило два раза.

Перечитал is the past tense of перечитать.

• Base verb: читать = to read
• Prefix: пере-
• Full verb: перечитать

In this sentence, перечитать means to read through again / to reread / to go over by reading.

A useful nuance: with два раза, Russian is often simply saying that the speaker went through the rule two times. In natural English, that may come out as:

• I read the rule twice
• I read over the rule twice
• I reread the rule twice

So the prefix пере- often adds the idea of again or over, but English translation depends on context.

This is mainly about aspect.

• читать / читал = imperfective
• перечитать / перечитал = perfective

Here, перечитал shows the action as completed. The speaker finished reading through the rule.

Compare:

• Я читал правило. = I was reading / I read the rule
  This does not strongly emphasize completion.
• Я перечитал правило. = I read through / reread the rule completely
  This presents it as a finished action.

Since the sentence also says два раза (twice), the perfective form fits well if the speaker means the rule was read through fully two times.

Because this is the past tense form.

In Russian past tense, the verb agrees with the subject in gender and number:

• перечитал = masculine singular
• перечитала = feminine singular
• перечитало = neuter singular
• перечитали = plural

So Я перечитал правило два раза normally suggests that the speaker is male.

If the speaker were female, it would be:

• Я перечитала правило два раза.

It is the object, and it is in the accusative case.
But for an inanimate neuter singular noun, the accusative looks the same as the nominative.

So:

• nominative: правило
• accusative: правило

That is why the form does not visibly change.

This is very common in Russian:

• Я вижу окно.
• Я читаю письмо.
• Я перечитал правило.

In all of these, the direct object is in the accusative, but the form may look unchanged.

Because after 2, 3, 4, the noun раз takes the form раза.

So you get:

• один раз = one time
• два раза = two times
• три раза = three times
• четыре раза = four times
• пять раз = five times

So два раза is the correct form for twice / two times.

Yes. Дважды also means twice.

So this sentence could also be:

• Я дважды перечитал правило.

The difference is mostly style:

• два раза = very common, neutral, conversational
• дважды = also common, but often a little more compact or slightly more formal/bookish in tone

Both are correct.

Yes. Russian word order is much more flexible than English word order.

The sentence

• Я перечитал правило два раза.

is a neutral, natural version.

But you could also say:

• Я два раза перечитал правило.
• Правило я перечитал два раза.
• Два раза я перечитал правило.

The basic meaning stays the same, but the focus changes:

• putting два раза earlier can emphasize how many times
• putting правило earlier can emphasize what was read

So Russian word order often reflects emphasis and information flow, not just grammar.

Yes, very often.

Russian frequently drops subject pronouns when the subject is clear from context. So you could say:

• Перечитал правило два раза.

That would still mean I read/reread the rule twice, if the context already makes it clear who is speaking.

Including я can do things like:

• make the subject explicit
• add contrast: Я перечитал, а он нет = I reread it, but he didn’t
• sound clearer when the context is not obvious

It describes the action, not the noun.

So:

• Я перечитал правило два раза. = I read the rule two times

It does not mean there were two rules. If you wanted to say two rules, you would say something like:

• Я перечитал два правила.

So два раза is an adverbial expression meaning twice / two times, and it tells you how many times the reading happened.

Not necessarily.

This is a place where Russian and English do not always line up perfectly word-for-word.

Because of перечитал, the sentence has the sense of read through / read over / reread, but with два раза, the overall idea is usually just that the speaker went through the rule twice.

So in practice, the sentence is often best understood as:

• I read the rule twice
• I read over the rule twice

rather than doing strict arithmetic like one first reading + two more rereadings.

Context decides how strongly the again sense of пере- is felt.

Only the past-tense verb changes:

• Я перечитала правило два раза.

Everything else stays the same.

So:

• male speaker: Я перечитал правило два раза.
• female speaker: Я перечитала правило два раза.