Reference
The -des form
"While doing": two things at once, folded into one sentence.
- The ending that carries it
- -des
- Called
- des-vorm
- the converb, or gerund in an English grammar book
What it is for
- Two things at once, with no "and" or "while" needed
Naerdes paljastusid laiad esihambad ja igemed.
As they laughed, their broad front teeth and gums were revealed.
Mees köhib tatti pritsides.
The man is coughing and spitting phlegm.
- Writers much prefer it to two sentences joined up