Which version of the verb should be used with "every"?
Every added to a noun makes it act as a singular. This includes "everyone", e.g. Everyone likes Saturdays.
When you use "every" with a verb, you should use the third person singular (he/she/it) version of the verb, e.g. For every action, there is an equal and opposite reaction.
Sometimes, every can be used to modify a combine noun, e.g. Every boy and girl has to take part. Here, "every" takes the whole verb chunk "boy and girl" and makes it singular. Again, you should use the third person singular version of the verb, has, not have.
Examples of every in a sentence
But on this, as on every other point, Mimi had been adamant.- Seeing Stars by Diane Hammond
It was what she dreamed about every night before she fell asleep;- Seeing Stars by Diane Hammond
She was off-book, like Mimi had told her to be for every audition.- Seeing Stars by Diane Hammond
Every time she’d been in the studio there were pizza boxes scattered around like C-rations.- Seeing Stars by Diane Hammond