Learn Danish: Klovnen hoppede fløjtende, så pigen grinede. - The clown jumped whistling, so the girl laughed.

Fløjtende is the present participle of at fløjte (to whistle). Here, it acts as an adverb of manner telling us how the clown jumped. In Danish, when you combine a verb of motion like hoppede with a present participle, it describes an ongoing action happening at the exact same time as the movement.

Does the ending of fløjtende change because the sentence is in the past tense?

No. The present participle in Danish always ends in -ende or -nde and never changes to match the tense of the main verb, nor does it change for gender or plural forms. Even though the clown jumped in the past (hoppede), the form remains exactly as fløjtende.

Could I just say Klovnen hoppede og fløjtede instead?

Yes, you could! Saying Klovnen hoppede og fløjtede (The clown jumped and whistled) is grammatically correct and very common in spoken Danish. However, using the present participle (hoppede fløjtende) is more elegant and strongly emphasizes that the whistling was the specific way he jumped, rather than just two separate actions.

Why doesn't the word order invert after så here?

When så means "so" or "therefore" to show a direct consequence, it acts as a coordinating conjunction. This means it simply links two independent main clauses. Because it starts a new main clause, we use the standard straight word order: subject (pigen) immediately followed by the verb (grinede).