What is it? = Co je to?
It is a coffee. /  It\'s a coffee. = To je káva.
It is a beer. / It\'s a beer. = To je pivo.
It is a teacher. / It\'s a teacher. = To je učitel.

It is good. / It\'s good. = To je dobré.
It is happy. / It\'s happy. = To je šťastné.