Multiple is not a verb, so it does not have a past tense. If you meant multiply, then it is multiplied.
"Multiple" is an adjective and "decisions" is a noun. There is no past tense for either. "Decide" is a verb though, the past tense being "decided." You could say "I made multiple decisions."
Past tense: She walked to the store yesterday. Present perfect tense: She has walked to the store multiple times this week.
Edges is both a plural noun (i.e. multiple corners) and a verb (i.e. to tiptoe around something). The noun, of course, has no past tense since nouns do not have past tenses. The past tense of the verb is "edged".
the past tense of am is was and the past tense of has is had
The past tense of "has" is "had" and the past tense of "have" is "had."
Was and were are both the past tense of be. The present tense is: I am he is you are they are The past tense is: I was he was you were they were
"will be" is the future tense of "be". The past tense of "be" is "was/were".
The verb "sing" has multiple tenses, including simple present (sing), simple past (sang), and past participle (sung).
The past tense of "she do" is "she did."
The word "were" is past tense. It is the past tense of the verb "to be."
The past tense of "will" is "would" and the past tense of "be" is "was" or "were" depending on the subject (singular or plural).
HAD is the Past Tense of TO HAVE.