You can't because perjury is a noun, not a verb.
It seems to be used as a verb of late:
"He perjured himself, when he claimed to have never seen the woman in question before."
The past tense of "perjury" would be "perjured."
Stoled is not the past tense of stole. Stole is the past tense of steal. The past participle is stolen.
The past tense of "adjourn" is "adjourned."
The past tense of "right" is "wrote".
Trial is a noun, and does not have a past tense.
The past tense for "steal" is "stole."
The past tense of "say" is "said."
The past tense of say is said.
"It has been" is in the present perfect tense because it indicates an action that started in the past and has continued up to the present moment.
Was is the past tense of the verb 'be'
To say in the past tense, you would use the word "said."
The past perfect tense of say is had said.
The past tense in 'ruined'
Said is already in the past tense. It's the past tense of say.
The past tense of say is said.
The past tense of "say" is "said."
The past tense of shout is "shouted"
The past tense of believe is believed.