" So, is it possible to replace "is" with "was"? Could isn't a past tense in the sentence. However, it is possible to replace is with was if the reference is to an occurrance in the past .
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tashiroCould" is the past form of "can." So, is it possible to replace "is" with "was"?Could isn't a past tense in the sentence. However, it is possible to replace is with was if the reference is to an occurrance in the past.