I can give you several sentences.
Example sentence - The ticket was invalid because the expiration date had passed.
The professor made such an amazing discovery that he nearly passed out right then and there!
Henry was disinclined to face the facts when his grandfather passed away.
By some mischance, a police car passed by just as the alarm went off, so the burglars were caught in the act.
The cheese was too strong for my taste, so I declined the cheese board as it was passed along the dinner party guests.
"Both my grandparents had passed away"
One way to use "past" and "passed" in the same sentence is: "I walked past the park where I passed my driving test." In this sentence, "past" refers to moving by or beyond something, while "passed" refers to successfully completing an action or moving ahead.
Her mother had passed away due to her sickness. (In this sentence, "passed away" is a euphemism for died.)
The drug passed inspection by the FDA.
There was a herd of deer that passed by recently.
People passed thing generation to generation.
Example sentence - The ticket was invalid because the expiration date had passed.
Is it "years past" or "years passed"? It depends on the context. If you are stating "In years past,..." then you use 'past'. If you are in the middle of your sentence "...when years passed by and nothing got done..." then you use 'passed'.
The couples passed the time by playing whist on the patio.
I don't think you passed that homework assignment.She passed out at the sight of blood.Your friend passed you in the race.
After his dad passed away, Mike's behavior has been aberrant.
A joint resolution was passed a few months ago.