Accident doesn't have a past tense as it's not a verb. It's a noun.
The simple past tense is: you saw a bad accident.
my brother had a road accident
The past tense of brake is braked.She saw the accident and braked quickly.Alternatively, if you mean 'break' as in smashing something, broke.He broke the glass vase.
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 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".
The past tense of "you will not" is "you would not."
The past tense is had.