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'Operation' is a noun not a verb, so it cannot have a past tense. A verb related to 'operation' might be operated, in which case the past tense would be be the same: operated. You could convey past tense though by adding did opreate, or had operated, but these are complex past tenses (with two verb forms).
What else can I help you with?
What is the past tense of fly and count?
Flew is the past tense of fly; counted is the past tense of count.
What is the past tense for rectify?
The past tense is rectified.
What is the past tense of step?
The past tense is stepped.
What is the past tense of enumerate?
The past tense is enumerated.
What is the past tense of add?
The past tense of add is added.
What is the past tense of operate?
"Operation" is a noun and so doesn't have a past tense. Only verbs have past tenses.
What is the past tense of am and has?
the past tense of am is was and the past tense of has is had
What is past tense of has and have?
The past tense of "has" is "had" and the past tense of "have" is "had."
What is the past tense of were?
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
What is the past tense of will be?
"will be" is the future tense of "be". The past tense of "be" is "was/were".
What is the past tense of she do?
The past tense is she did.
Is the word were past tense or present tense?
The word "were" is past tense. It is the past tense of the verb "to be."
What is the past tense of will and be?
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
What is the past tense and past perfect tense of exist?
Existed is the past tense. The past perfect tense is had existed.
What is the past tense of had?
HAD is the Past Tense of TO HAVE.
What is the past tense of you will not?
The past tense of "you will not" is "you would not."
What is the past tense of am with has?
The past tense of "am" is "was" and the past perfect tense of "has" is "had."
