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The verb is is the present tense.
The past tense of did is did. The present tense of did is do. The future tense of did is will do.
The present tense of "will be" is "am/is/are." For example, "I am," "he is," "they are."
Past tense I had
Present tense I have
Future Tense I will have
"Has" is in present tense. The past tense is "had".