Phrase pattern
Who → does what → how
A describing word works as an adverb unchanged and follows the verb
who+does what+how
Several rules work together in this pattern: who → does what → what; a describing word works as an adverb and follows the verb.
The person studies slowly
The student stands quietly
The man sleeps quietly
Practice with this pattern changes the words each time. They come from the words you're learning.
Kai says
The transcription uses bp and dt for sounds without an extra puff of air. The letters p and t mark their aspirated partners.