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Past simple
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In questions and negatives, the verb goes in...
the infinitive form
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The past form of "be" is...
was and were
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To regular verbs, we add...
ed or d
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The auxiliary we use in questions is...
Did
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The past form of "understand" is...
understood
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The past form of "say" is...
Said
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The structure of a question is...
Did + subject + verb (inf.) + ?
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The auxiliary we use in negatives is...
didn't / did not
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