Examples say what in Czech examples

How do I translate say what into Czech?

Simple sentences

I just don't know what to say.

Já starčí nevím, co říct.

I just don't know what to say.

Prostě nevím, co říct.

I don't know what to say to make you feel better.

Nevím, co říci, abych tě utěšil.

I don't know what to say to make you feel better.

Nevím, co ti říci pro útěchu.