Your first sentence is the past passive form, therefore you can apply this form to verb as same as the simple passive. The only point is the verb's last syllable will change in the passive structure, like English! Below is the examples.
(Simple Verb) push 押す
(Simple Passive) is pushed 押さ れる
(Past Passive) was pushed 押さ れた
Then, you might be confused to some of adj and verb.
(Simple Adj) be creepy 怖い
(Past Adj) was creepy 怖かった
Hope this helps you!