Final answer:
The sentence that correctly uses the past tense form of the verb to do is: My staff sent me a birthday card. My boss did not.
Step-by-step explanation:
The sentence that correctly uses the past tense form of the verb to do is:
My staff sent me a birthday card. My boss did not.
In this sentence, the verb 'did' is the past tense form of 'do' and is used correctly to indicate the action of not sending a birthday card.
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