Learn Swedish: Ikväll ska vi äta de färska tomaterna. - Tonight we will eat the fresh tomatoes.

Swedish uses the V2 rule, meaning the verb is usually the second piece of information in a statement. Because we started the sentence with the time word Ikväll (tonight), the verb ska has to come next, pushing the subject vi (we) to the third spot.

Why do we say de färska tomaterna? Isn't tomaterna already "the tomatoes"?

Yes, tomaterna means "the tomatoes". But Swedish has a double definite rule. When you use an adjective (like färska) with a specific, definite noun, you must also add a separate word for "the" in front of the adjective. For plural nouns, that word is de. So you are literally saying "the fresh tomatoes-the".

Why does färsk (fresh) have an -a at the end here?

In Swedish, adjectives change their endings to match the noun they describe. You add an -a when the noun is plural (more than one tomato) or when it is definite (a specific tomato). Since tomaterna is both plural and definite, färsk becomes färska.

How should I pronounce the word de in this sentence?

Even though it is spelled de, in spoken Swedish it is almost always pronounced "dom". This is the same way you pronounce the Swedish word for "they".