Learn Swedish: Han bromsade inte, så en olycka skedde. - He did not brake, so an accident occurred.

Here, så (so) works as a coordinating conjunction showing consequence. This means it simply links two complete, independent clauses together. Because of this, the second clause keeps the normal Subject-Verb word order (en olycka skedde).

What is the base form of the verb skedde?

The infinitive is att ske (to happen or occur). It belongs to a group of short verbs that end in a stressed vowel. To form the past tense for these, you add -dde, which is why it becomes skedde.

Could I use hände instead of skedde?

Yes! Both mean "happened" or "occurred". Att hända is the most common word for "to happen" in everyday speech. Att ske is a bit more formal and is often used for significant events, official reports, or accidents, which makes it a great choice here.

Why is there no word for "did" in Han bromsade inte?

Swedish does not use helper verbs like "do" or "did" to make a negative sentence. You just take the past tense main verb (bromsade) and put the negative word inte right after it, literally meaning "He braked not".