How do you form Ser commands?

Ser is irregular in the imperative tense

See the tables below for the full conjugations in both positive and negative forms.

Ser Commands - The Imperative Form

Spanish English
(tú) (you) be
(él) sea (he/she/it) be
(nosotros) seamos (we) let's be
(vosotros) sed (you) be
(ellos) sean (they) be

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Negative Ser Commands

Spanish English
(tú) no seas (you) do not be
(él) no sea (he/she/it) do not be
(nosotros) no seamos (we) let's not be
(vosotros) no seáis (you) do not be
(ellos) no sean (they) do not be