Jag lånade en roman av en bra författare igår kväll.

Lånade is the past tense of låna, which means to borrow.

• låna = to borrow
• lånade = borrowed

So Jag lånade ... means I borrowed ...

This is the Swedish preterite (simple past), which is often used the same way English uses borrowed.

By itself, låna usually means borrow.

• Jag lånade en bok. = I borrowed a book.

If you want to say lend, Swedish usually uses låna ut:

• Jag lånade ut en bok. = I lent out a book.

So in your sentence, Jag lånade en roman ..., the meaning is clearly I borrowed a novel ...

Jag is the subject form of I.

In this sentence, Jag is the person doing the action:

• Jag = I
• lånade = borrowed

So Jag lånade ... literally means I borrowed ...

English also uses the subject form here: I borrowed, not me borrowed.

Because both roman and författare are en-words in Swedish.

Swedish nouns usually belong to one of two grammatical genders:

• en-words
• ett-words

Here:

• en roman = a novel
• en författare = an author

Since bra författare still has författare as the noun, it also takes en:

• en bra författare = a good author

Because Swedish, like English, uses an indefinite article for each separate indefinite noun phrase.

There are two noun phrases here:

1. en roman = a novel
2. en bra författare = a good author

So Swedish needs en for both, just as English says:

• a novel
• a good author

Here av means by in the sense of authorship:

• en roman av en bra författare = a novel by a good author

So av connects the work to the person who wrote it.

This is different from other uses of av, which can sometimes mean things like of, from, or by, depending on context.

In theory, av can have different meanings in Swedish, but in this sentence the most natural reading is by a good author, because it directly follows en roman.

So the structure is understood as:

• [en roman] [av en bra författare]
• a novel by a good author

If you wanted to say I borrowed it from someone, Swedish would more naturally use another structure, for example:

• Jag lånade en roman från en bra författare. = I borrowed a novel from a good author.

But with roman av författare, the normal interpretation is authorship.

Yes, many Swedish adjectives change form, but bra is one of the adjectives that usually stays the same.

So you get:

• en bra författare = a good author
• ett bra hus = a good house
• bra böcker = good books

Unlike many other adjectives, bra does not normally change to match gender or number.

No. Swedish roman means novel, not romance.

So:

• en roman = a novel

A native English speaker might guess it means a romance, but that is a false friend here. A Swedish roman can be any kind of novel, not just a love story.

Because in a normal Swedish main clause, it is very common to put time expressions like this later in the sentence.

So:

• Jag lånade en roman av en bra författare igår kväll.

is a very natural word order.

The sentence starts with the subject Jag, then the verb lånade, then the object and extra information, and finally the time expression igår kväll.

Yes. Swedish word order is somewhat flexible, but if you move igår kväll to the front, Swedish follows the V2 rule: the finite verb must still come in the second position.

So you can say:

• Igår kväll lånade jag en roman av en bra författare.

Notice that when Igår kväll comes first, lånade must come next, and jag moves after the verb.

You cannot keep the English-style order:

• Igår kväll jag lånade ... ❌

Because Swedish usually does not use a preposition with common time expressions like this.

• igår = yesterday
• igår kväll = yesterday evening

So Swedish says:

• Jag kom igår. = I came yesterday.
• Vi sågs igår kväll. = We met yesterday evening.

English also usually says yesterday evening, not on yesterday evening, so the two languages are fairly similar here.

Because the sentence is talking about a novel, not the novel.

• en roman = a novel
• romanen = the novel

The indefinite form is used when the thing is not already identified for the listener or is being mentioned for the first time.

So:

• Jag lånade en roman ... = I borrowed a novel ...
• Jag lånade romanen ... = I borrowed the novel ...

In Swedish, if you start with the time expression, the verb must still stay in second position:

• Igår kväll lånade jag en roman av en bra författare.

This is one of the most important Swedish word-order patterns to learn. Swedish is a V2 language, which means the finite verb comes second in main clauses, even if something other than the subject comes first.