Questions & Answers about Han bär alltid med sig en bok.
Why do we use sig instead of honom here?
Because the preposition refers back to the subject of the sentence. Whenever an action involves the third-person subject doing something with or to themselves, Swedish uses the reflexive pronoun sig. If you wrote Han bär alltid med honom en bok, it would mean he is carrying a book around with a completely different guy!
What does med sig add to the verb? Couldn't we just say Han bär alltid en bok?
You could, but bära on its own focuses heavily on the physical act of carrying or holding a weight. Using the phrase bära med sig specifically means to bring something along with you or keep it on your person (like in a bag or pocket) as you go about your day.
Why does alltid come after the verb bär, unlike in English?
This is a great reminder of the Swedish V2 (verb-second) rule. In a main clause, the conjugated verb (bär) must take the second position. Sentence adverbs like alltid (always), aldrig (never), or ofta (often) naturally slide into the position immediately after that first verb.
Can I change the word order to Han bär alltid en bok med sig?