'Cath' is a noun, it doesn't have a past tense.
It is only verbs that have tenses.
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Destroyed is the past tense of destroy...therefore there is not a past tense for destroyed.
The past tense is smote.
"Responsible" is an adjective. It does not have a past tense. Instead, the past tense would apply to the word before. (Present - she is responsible, Past - she was responsible.)
The word 'at' is not a verb and so doesn't have a past tense.
The past tense of rip is ripped.