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The simple past is used to speak of a concrete action that began and ended in the past
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Subject (I, he, she, it, you, we, they), Auxiliary (did) and
Gerund(wanted, learned, stayed, walked...) -
Subject + verb in past (ed ending, exept in irregular verbs)
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--> The keys were in the drawer
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-Subject + did not (did not) + infinitive verb
-Subject + "to be" + not -
-->They didn't learn English
-->She wasn't a doctor -
-Did + subject + infinitive verb?
-To be + Subject? -
-->Did you buy a blue car?
-->Were the keys in the drawer?