osastav (3rd form)
Some of something, an action that isn't finished, and anything after a number.
The ending
None. This one you learn by heart.
In EnglishSome water. A book you're reading but haven't finished.
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Jõin klaasi vett.
I drank a glass of water.
Sõin tüki torti.
I ate a piece of cake.
Ahv sööb banaani.
The monkey is eating a banana.
Ootasime kontserdi algust.
We were waiting for the concert to start.
Autol on neli ratast.
The car has four wheels.
Nende peres on viis last.
They have five children in their family.
Watch out
English doesn't mark any of this, so there's no instinct to lean on at first. The form can't be guessed either, so learn it with each new word.
| Word | omastav (2nd form) | osastav (3rd form) |
|---|---|---|
| aadressaddress | aadressi | aadressimemorized |
| abihelp | abi | abimemorized |
| aegtime | aja | aegamemorized |
| algusbeginning | alguse | algustmemorized |
| apelsinorange | apelsini | apelsinimemorized |
| aprillApril | aprilli | aprillimemorized |
Which one is algus, beginning, in the osastav?
Kirjutasin ümbrikule aadressi: Ehitajate tee 102–60, 13517, Tallinn, Eesti.
I wrote the address on the envelope: Ehitajate tee 102–60, 13517, Tallinn, Estonia.
Here aadressi is the osastav (3rd form) of aadress.
Vajan dokumentide vormistamisel abi.
I need help with preparing the documents.
Here abi is the osastav (3rd form) of abi.
Kevadeni on veel palju aega.
There is still a long time until spring.
Here aega is the osastav (3rd form) of aeg.