Paul mange rarement des aubergines, mais il aime les navets dans la soupe.

In French, short adverbs of frequency like souvent, toujours, parfois, and rarement usually go after the conjugated verb.

So:

• Paul mange rarement des aubergines.

This is the normal French word order.

English often puts adverbs in more flexible positions, but French is less flexible here. A version like Paul rarement mange... would sound wrong, and Paul mange des aubergines rarement is not the usual way to say it.

Des aubergines means eggplants / some eggplants in a general, indefinite sense.

Here, des is the plural indefinite/partitive article. It is used when talking about plural countable things in a non-specific way:

• Il mange des pommes. = He eats apples.
• Elle achète des tomates. = She buys tomatoes.

So Paul mange rarement des aubergines means Paul rarely eats eggplants, not a specific set of eggplants.

This is a very common question. In il aime les navets, les is used because French often uses the definite article when talking about things someone likes, loves, hates, or prefers in a general sense.

So:

• J’aime les pommes. = I like apples.
• Elle adore les chiens. = She loves dogs.
• Il aime les navets. = He likes turnips.

English often uses no article in these cases, but French usually needs one.

If you said il aime des navets, it would usually sound like you mean some particular turnips, which is not the general idea here.

In normal French, you usually repeat the subject pronoun after mais if the second clause has its own verb.

So the natural sentence is:

• Paul mange rarement des aubergines, mais il aime les navets dans la soupe.

French generally does not omit the subject the way English sometimes can in coordinated sentences. In English, Paul rarely eats eggplants, but likes turnips in soup is possible, though slightly compressed. In French, leaving out il here would sound incomplete or unnatural.

Yes. Rarement means rarely, seldom, or not often.

So:

• Paul mange rarement des aubergines
  can be understood as
• Paul rarely eats eggplants
• Paul does not often eat eggplants

It is a single-word adverb, and it is more concise than saying something like ne mange pas souvent.

Yes. You could say:

• Paul ne mange pas souvent d’aubergines.

This also means Paul does not eat eggplants often.

There is a small grammar difference, though:

• With rarement: Paul mange rarement des aubergines
• With ne... pas souvent: Paul ne mange pas souvent d’aubergines

After a negated expression like ne... pas, French often changes des to de/d’ before a plural noun. That is why you get d’aubergines, not des aubergines, in the negative version.

Because rarement is not a negative marker by itself.

French changes des to de/d’ mainly after straightforward negation such as:

• ne... pas
• ne... jamais
• ne... plus

Example:

• Il mange des aubergines.
• Il ne mange pas d’aubergines.

But rarement just means rarely; it does not trigger that article change. So:

• Il mange rarement des aubergines.

is correct.

In this sentence, dans la soupe is most naturally understood as describing the context in which he likes turnips: he likes turnips in soup.

So the idea is:

• He likes turnips when they are in soup.

French often places a phrase like dans la soupe at the end, and the meaning is understood from context. Here it most naturally goes with les navets rather than meaning something odd like he likes things while he is in the soup.

Dans la soupe literally means in the soup, and that is the natural phrase here if you mean the turnips are inside the soup.

• les navets dans la soupe = turnips in soup

En soupe would not be the normal choice for this meaning here.
À la soupe usually does not mean physically inside the soup; it can have other idiomatic meanings depending on context.

So if the idea is simply that he likes turnips when they are part of a soup, dans la soupe is a good, natural choice.

In a sentence with aimer, it usually means turnips in general.

So:

• Il aime les navets = He likes turnips.

French uses the definite article for general categories much more than English does. English says He likes turnips, but French says Il aime les navets.

Of course, context can sometimes make les navets refer to specific turnips, but without extra context, the general reading is the normal one here.

Yes, but the meaning would change.

• une aubergine = one eggplant
• un navet = one turnip

The plural in the original sentence sounds natural because it talks about these foods as categories or types of food:

• Paul mange rarement des aubergines
• il aime les navets dans la soupe

If you made them singular, it would sound more like one item or a more abstract category statement, depending on the structure. For example:

• Paul mange rarement une aubergine = Paul rarely eats one eggplant / an eggplant
• Il aime le navet dans la soupe = He likes turnip in soup / he likes the turnip in soup

That is possible in some contexts, but the plural is more natural here.

A rough guide:

• aubergines ≈ oh-behr-zheen
• navets ≈ na-vay

A few helpful points:

• The s in aubergines and navets is normally silent.
• The final t in navets is also normally silent.
• In careful speech, des aubergines may have a liaison, so you may hear something like day-zoh-behr-zheen.

So the full sentence is roughly:

• Paul mange rarement des aubergines, mais il aime les navets dans la soupe.

Yes, in this sentence mais works just like but to contrast two ideas:

• Paul rarely eats eggplants,
• but he likes turnips in soup.

It links two clauses that contrast with each other. This is one of the most direct and common uses of mais.

Yes. Even if the basic meaning is already known, it is useful to know that French and English do not always line up word-for-word.

• mange rarement can be rarely eats or doesn’t often eat
• aubergines can be eggplants or, in some varieties of English, eggplant
• aime les navets is literally likes the turnips, but naturally in English it is just likes turnips

So a natural English rendering can vary a little while keeping the same meaning.