Learn Swedish: Bilen är trasig. Alltså tar jag bussen. - The car is broken. Therefore I take the bus.

Alltså (therefore) is a conjunctive adverb, not a regular conjunction like och (and) or men (but). When you start a sentence with an adverb like this, the Swedish V2 (verb-second) rule applies. The verb tar must be the second element in the sentence, which pushes the subject jag to the third spot.

Wait, doesn't alltså mean "also"?

No, that is a very common false friend for English speakers! Alltså means "therefore", "thus", or "so" (drawing a conclusion). If you want to say "also", you should use också or dessutom (furthermore/besides).

Could I combine these into one sentence with a comma: Bilen är trasig, alltså tar jag bussen?

Yes, you can. Alltså can either start a brand new sentence or follow a comma to connect two clauses. Just remember that even after a comma, it still acts as the first element of its own clause, so the V2 rule still requires the verb to come right after it (..., alltså tar jag...).

Can I use trasig for anything that is broken, like a broken arm?