Popular is an adjective and doesn't have any tenses.
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."
Past tense, third person, is the most popular and the easiest, least distracting for most people. Most popular books are written in past tense, so follow suit would probably be prudent.
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 past tense is she did.
The word "were" is past tense. It is the past tense of the verb "to be."
it depends on which cool. Like the cool as in hot and cold it would be cooled. But, if it was for popular it would be ,was cool
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
The past tense of "you will not" is "you would not."
The past tense is had.
The past tense of "am" is "was" and the past perfect tense of "has" is "had."