Hän juoksi niin kovaa kuin pystyi.

English Translation

He ran as fast as he could.

Pedantic grammar comment: Shouldn’t ‘kovaa’ be an adverb, ‘kovasti’, since it applies to ‘juoksi’? ‘He ran as hard as he could’?

It is an adverb:

Adverb
kovaa (comparative kovempaa, superlative kovimpaa)

fast, hard, loud
ajaa kovaa ― to drive fast
lyödä kovaa ― to punch hard
huutaa kovaa ― to shout loud
Älä soita niin kovaa! ― Don’t play (it) so loud!

(kovaa - Wiktionary, the free dictionary)

2 Likes

Aargh, I hate this! I have this mistake before. There is hilja but no hiljasti. It is hiljaa