Marie reprend connaissance.

Because reprend is the present tense form of the verb reprendre for il / elle / on.

• reprendre = the infinitive, meaning to take again, to resume, or in this expression, to regain
• Marie is a third-person singular subject, so the verb must be conjugated:
  • je reprends
  • tu reprends
  • il/elle reprend
  • nous reprenons
  • vous reprenez
  • ils/elles reprennent

So Marie reprend connaissance means Marie regains consciousness / Marie comes to.

That is its basic meaning, yes. But in French, reprendre has several related uses, including:

• to take again
• to resume
• to recover / regain

In reprendre connaissance, it means to regain. This is a fixed expression:

• perdre connaissance = to lose consciousness
• reprendre connaissance = to regain consciousness

So this is not a word-for-word take knowledge again kind of sentence. It is an idiomatic expression.

Yes, connaissance often means knowledge or awareness, but in the expression reprendre connaissance, it means consciousness.

French often uses nouns in set expressions that do not match English word-for-word. Here are two useful ones:

• perdre connaissance = to faint / lose consciousness
• reprendre connaissance = to regain consciousness

So even if you know connaissance from phrases like avoir connaissance de or faire connaissance, here it belongs to a medical/common expression with a specific meaning.

Because reprendre connaissance is a fixed idiomatic expression. French often omits the article in certain verb+noun expressions.

Here, you do not usually say:

• reprendre la connaissance ❌

You say:

• reprendre connaissance ✅

This is similar to other set expressions where English learners may expect an article, but French does not use one.

Yes. Marie is the subject, and reprend is the verb.

The basic structure is:

• Marie = subject
• reprend = verb
• connaissance = noun completing the expression

So the sentence is grammatically simple, even though the verb+noun combination is idiomatic.

Sometimes, but it is not exactly the same.

• Marie se réveille = Marie wakes up
• Marie reprend connaissance = Marie regains consciousness

Se réveiller is used for waking from sleep, and sometimes from unconsciousness in a general sense. But reprendre connaissance is more specific and is especially appropriate after fainting, injury, anesthesia, or some period of unconsciousness.

So if someone has passed out, reprendre connaissance is often the more precise expression.

French often uses the present tense to describe actions vividly, especially in narration, summaries, news reports, or storytelling.

So:

• Marie reprend connaissance.
  can mean literally Marie is regaining consciousness / Marie regains consciousness, but depending on context it may also feel like narrative English: Marie regains consciousness.

If the whole story is being told in the past, French could also say:

• Marie a repris connaissance. = Marie regained / has regained consciousness
• Marie reprit connaissance. = literary past, common in written narrative

So the present here is perfectly normal, especially for a simple standalone sentence.

A rough pronunciation guide is:

• Marie ≈ mah-REE
• reprend ≈ ruh-PRAHN
• connaissance ≈ koh-NEH-sahns

A few pronunciation notes:

• The -ent in reprend is not pronounced.
• The en in reprend is a nasal sound.
• connaissance has a clear ss sound because of the ss spelling.
• In normal speech, you may hear a liaison after reprend before connaissance, so it can sound like repren-t-connaissance.

It is completely normal and common French. It can appear in:

• everyday speech
• news reports
• medical contexts
• literature

For example:

• Après quelques minutes, elle reprend connaissance.
• Le blessé a repris connaissance à l’hôpital.

So it is not too formal, but it is a bit more specific than a general verb like se réveiller.

Yes. The expression works with any subject; only the verb changes.

Examples:

• Je reprends connaissance. = I regain consciousness.
• Tu reprends connaissance. = You regain consciousness.
• Il reprend connaissance. = He regains consciousness.
• Nous reprenons connaissance. = We regain consciousness.
• Elles reprennent connaissance. = They regain consciousness.

The noun connaissance stays the same.

Yes: perdre connaissance.

These two are very often learned together:

• perdre connaissance = to lose consciousness / to pass out
• reprendre connaissance = to regain consciousness / to come to

Example pair:

• Marie perd connaissance.
• Marie reprend connaissance quelques minutes plus tard.

Learning them as a pair is very useful because they form a natural opposite set in French.