Usages of -ko
Hän ei ole varma, tuleeko hän kokeeseen lauantaina.
He/She is not sure whether he/she will come to the exam on Saturday.
En ole varma, valitsenko mustat housut vai harmaat farkut juhlaan.
I am not sure whether I will choose black trousers or grey jeans for the party.
En ole varma, onko tämä oikein.
I am not sure whether this is correct.
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