the man has prescient knowledge
It's is used in a sentence when it is would be used.
For example:
It's easy = It is easy.
here are more examples:
It's not a pretty site.
He said it's fine.
i do not know how to use embalming in a sentence. (there is the sentence)
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.
How do use evidenced in a sentence
How do you use chairperson in a sentence?
how to use theordora in a sentence
can i use polymer in a sentence
This is how you use mound in a sentence
How to use foundation in a sentence
"I can use 'salutary' in a sentence!"
use figureatively in a sentence
use inmates in sentence
Use it in a big sentence.