Every means tried but without any result.
Jim, I am sure __________ we met, we were at a rock concert, and since then we’ve known each other.
--- Ouch! You stepped on my toe!--- I’m sorry, I didn’t __________.
I wonder when it was __________ you came to realize __________ he said meant.
--- How come you know the accident so well?--- Well, because I was on the __________.
--- Nancy, can I take a look at the note you took for last period, please?--- I’m sorry, I __________ something else then. I’ll make it up right away.