Doubled is already the past tense form of double.
The past tense of "cleaned" does not have a double "n" because it follows the general rule of forming past tense verbs by adding "-ed" at the end. The word "clean" does not have a double "n," so when the past tense is formed, the "-ed" is simply added to the end of the base form "clean."
Verbs that double the end of the last letter in the past tense include "stop" (stopped), "refer" (referred), and "occur" (occurred).
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
It depends on the context. For example, the past perfect tense already uses the verb "had" to depict the tense.
"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."
The past tense of "will" is "would". The past tense of "to be" is "was" or "were".
HAD is the Past Tense of TO HAVE.
The past tense is had.