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English as an Additional Language/Copular verb to be: past tense
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Conjugating copular verb to be is very easy.
Past Tense of Copular Verb to Be
Copular verb to be is conjugated in this manner:
1st person singular: I was.
2nd person singular: You were.
3rd person singular: He/She/It was.
1st person plural: We were.
2nd person plural: You were.
3rd person plural: They were.
As you can see, 1st and 3rd person singular take was. All other cases take were.