Петро почувається сильним.

Почувається means feels in the sense of how someone is feeling physically or emotionally.

So Петро почувається сильним means Petro feels strong.

A useful comparison:

• почуватися = to feel, to be feeling
• відчувати = to feel, to sense, to experience

For example:

• Я почуваюся добре. = I feel well.
• Я відчуваю холод. = I feel cold / I sense cold.

In this sentence, почуватися is the natural verb because it describes Petro’s condition or state.

After почуватися, Ukrainian usually uses the instrumental case for the word that describes the state someone feels themselves to be in.

So:

• сильний = nominative masculine singular
• сильним = instrumental masculine singular

That is why we say:

• Петро почувається сильним.

This pattern is very common:

• Вона почувається щасливою. = She feels happy.
• Я почуваюся втомленим. = I feel tired.

For an English speaker, this may feel unusual because English just keeps the adjective unchanged, but Ukrainian marks it with case.

It is still an adjective. It agrees with Петро in:

• gender: masculine
• number: singular

But it appears in the instrumental case because of the verb почуватися.

So the forms are:

• сильний — nominative masculine singular
• сильним — instrumental masculine singular

It is not turning into an adverb. It is still describing Petro.

The verb is почуватися, which is a reflexive verb. The ending -ся is part of the verb.

In many cases, reflexive verbs in Ukrainian do not translate literally as oneself in English. You usually just learn them as a complete verb.

So:

• почувати by itself is not the normal verb you would use here
• почуватися = to feel

In this sentence:

• почувається = he feels

Почувається is:

• present tense
• 3rd person singular
• from почуватися

So the basic pattern is:

• я почуваюся = I feel
• ти почуваєшся = you feel
• він / вона почувається = he / she feels
• ми почуваємося = we feel
• ви почуваєтеся = you feel
• вони почуваються = they feel

Because the subject is Петро, we need the 3rd person singular form: почувається.

A rough pronunciation is:

po-choo-VA-ye-tsya

A few helpful points:

• ч sounds like ch in church
• у sounds like oo in boot
• є here gives a ye sound
• ться / -ється is often pronounced more smoothly than it looks in writing

So the full sentence is roughly:

PE-tro po-choo-VA-ye-tsya SYL-nym

The stress is usually:

• Петро́
• почува́ється
• си́льним

Yes, but it means something slightly different.

• Петро сильний. = Petro is strong.
• Петро почувається сильним. = Petro feels strong.

The first sentence describes Petro as a fact or general quality.

The second describes his current feeling or inner sense of himself.

Compare:

• Вона щаслива. = She is happy.
• Вона почувається щасливою. = She feels happy.

So the version with почувається focuses on the person’s experience.

Yes. Ukrainian word order is fairly flexible, though the neutral order here is:

• Петро почувається сильним.

You might also hear:

• Сильним почувається Петро.
• Петро сильним почувається.

These alternative orders usually change the emphasis, not the basic meaning.

For learners, the normal and safest order is:

• subject + verb + complement
• Петро почувається сильним.

Yes. It is often used with:

1. Adjectives in the instrumental

   • Я почуваюся втомленим. = I feel tired.
   • Вона почувається спокійною. = She feels calm.

2. Adverbs

   • Я почуваюся добре. = I feel well.
   • Вони почуваються погано. = They feel bad.

3. Sometimes phrases describing a situation

   • Він почувається як удома. = He feels at home.

So почуватися is a very useful verb for talking about physical and emotional states.

Because Петро is the subject of the sentence, so it is in the nominative case.

The sentence structure is:

• Петро — subject, nominative
• почувається — verb
• сильним — adjective in the instrumental, linked to the subject through the verb

If Petro were in another role, his form could change in other cases. But here he is simply the one doing the feeling.

Yes, it is natural and correct.

A native speaker might also say:

• Петро відчуває себе сильним.

This also means Petro feels strong.

The difference is small:

• почуватися is very common for describing one’s state
• відчувати себе is also common and can sound a bit more explicit, like to feel oneself to be

Both are good, but Петро почувається сильним is a very standard, natural sentence.