CORRUS: Learn to Speak and Read Russian Naturally

To give a negative answer, say shortly нет (no) or нет, э́то не something (no, it is not something).

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Э́то зе́бра? – Нет, э́то не зебра́.

Is it a zebra? – No, it is not a zebra.

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Э́то кенгуру́? – Нет, э́то не кенгуру́.

Is it a kangaroo? – No, it is not a kangaroo.