Well like in most sentences we all do it they are the words we use all the time
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.
You can use this sentence if you like.
How would you like me to put that in a sentence?
You can use the word Truss in a sentence like this.
I use taxonomy like this.
Not like THIS!
like that
You would use deem in a sentence like 'I deem this site to be unsafe'
That IS a sentence.
I like using the word octagon in a sentence.
you use ATM in a sentence like,the ATM machine was broken so i went to the bank stuff like that to.
You can use boastful in a sentence like this. Sam was very boastful after they won the game.