- If you were confident it was going to rain yesterday, this is an example of when you knew it would rain.
- If you were friends with Joe in high school, this is an example of when you knew Joe in high school.
- If you used to know algebra, this is an example of when you knew algebra.
Knew is defined as you had an awareness of, were familiar with, or were certain about something.
- He knew what she meant.
- Of course, she knew Alex well enough now to know he didn't like people to hand out information about him.
- He knew exactly what he wanted and I told him we would buy it for him.
- Alex knew very well what he wanted.
- I never knew there was so much.