Paul est généreux avec ses amis.

Est is the third-person singular form of être, which means to be.

So:

• Paul est... = Paul is...

It is used because the sentence is describing a quality of Paul: he is generous.

Généreux is the masculine singular form of the adjective generous.

Because Paul is masculine and singular, the adjective matches him:

• masculine singular: généreux
• feminine singular: généreuse
• masculine plural: généreux
• feminine plural: généreuses

For example:

• Paul est généreux.
• Marie est généreuse.

In French, when an adjective comes after être to describe someone, you usually do not use an article.

So:

• Paul est généreux = Paul is generous

Not:

• Paul est un généreux ❌

That would sound unnatural here. You are simply describing Paul’s character.

Avec ses amis means with his friends.

Breaking it down:

• avec = with
• ses = his / her before a plural noun
• amis = friends

So the phrase tells you toward whom Paul is generous.

A natural English translation is:

• Paul is generous with his friends
• or, depending on context, Paul is generous toward his friends

French often uses généreux avec quelqu’un to mean generous with someone.

So:

• Paul est généreux avec ses amis = Paul behaves generously toward his friends

Other prepositions can exist in French, but avec is the most straightforward and common choice in a sentence like this.

• avec focuses on how he is with them
• envers can also mean toward, but it is often a bit more formal
• pour would usually suggest for someone, which is not the most natural choice here

Yes. Ses can mean his, her, or even its, depending on who the owner is.

French possessive adjectives agree with the thing possessed, not with the owner.

Since amis is plural, French uses:

• mon / ma / mes
• ton / ta / tes
• son / sa / ses

So:

• ses amis = his friends or her friends

In this sentence, because the subject is Paul, we understand it as his friends.

Both are possible, but they are used a little differently.

• ses amis = his friends
• les amis de Paul = Paul’s friends

Using ses amis is more natural when it is already clear that you are talking about Paul.

Because Paul is the subject of the sentence, French normally prefers the possessive:

• Paul est généreux avec ses amis.

Amis is plural because it means friends, more than one.

In French, plural nouns often add -s, but that final -s is usually not pronounced.

So:

• ami and amis sound the same by themselves in many contexts

You usually know it is plural because of:

• the determiner: ses
• the meaning of the sentence

A rough pronunciation is:

• zhay-nay-RUH

More approximately in IPA: /ʒe.ne.ʁø/

A few points:

• gé- sounds like zhay
• the r is the French r, made farther back in the throat
• -eux sounds like eu in French, not like English zoo or rocks

If you are a beginner, the most important thing is to avoid pronouncing the final x. It is silent.

A rough guide is:

Paul eh zhay-nay-RUH ah-VEK say zah-MEE

More carefully:

• Paul = Pol
• est = eh
• généreux = zhay-nay-RUH
• avec = ah-VEK
• ses amis = say zah-MEE

Notice the liaison between ses and amis:

• ses amis sounds like say-zah-mee

That z sound appears because ses ends in s and amis begins with a vowel.

Because généreux is not directly modifying a noun here. It is part of the structure:

• subject + être + adjective

So:

• Paul est généreux = Paul is generous

This is different from a phrase like:

• un homme généreux = a generous man

In both English and French, adjectives used after to be / être come after the verb.

Yes. Even though the literal words are with his friends, the meaning in English is often closer to:

• Paul is generous to his friends
• Paul is generous toward his friends

French avec in this kind of sentence often describes Paul’s behavior in relation to them, not just physical company.

So the exact English wording may vary, but the core meaning stays the same.

Yes. The adjective would need to agree in gender.

If the person were female, you would say:

• Pauline est généreuse avec ses amis.

The change is:

• généreux → généreuse

Everything else can stay the same if amis refers to male or mixed-gender friends. If the friends were all female, you could also say:

• Pauline est généreuse avec ses amies.

Yes.

• Paul est généreux = Paul is generous

That gives a general description of his personality.

Adding avec ses amis makes the statement more specific:

• he is generous with / toward his friends

So the extra phrase narrows the context.