Translation:Ano, to je hezké!
ty jsi, to je, what else? can someone state them for me?
Have a look at the Tips and Notes for To Be-Singular and To Be-Plural. (I think these are only available on the web version for now, though.) Or you could click the link for 12. Irregular Verbs here: https://en.wikipedia.org/wiki/Czech_conjugation.