Café-grammar. Abessive case.

If you want to make sure you´ll get coffee without sugar then you must use the abessive case. 
To form the abessive case you need to add the marker -ta to the genitive form.

Abessive case: without what? 
Abessiiv. Milleta?

Nominative:     suhkur            koor              sidrun
Genitive:            suhkru            koore            sidruni

Abessive:          suhkruta         kooreta      sidrunita

Kohv suhkruta. - Coffee without sugar. 
Kohv kooreta. - Coffee without cream. 
Tee sidrunita. - Tea without lemon. 

NB!  Kohv suhkruta. = Kohv ilma suhkruta
NB!  Kohv suhkruta ja kooreta. = Kohv suhkru ja kooreta

EXERCISE 1
EXERCISE 2