Use or in a sentence when linking alternatives.
You must hand homework in on time or get a zero.
Would you like a healthy fruit or an unhealthy twinkie?
Are is a verb.
The classes are competing for prizes for the one that has the highest percentage of homework completed on time.
The students are happy that school is out for the summer.
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 you use sedition in a sentence
use contingency in a sentence?
use adainty as sentence
use aver in a sentence
Can you use abstemious in a sentence?
use ize in sentence
This is how you use mound in a sentence
enjoin use in sentence
how can we use travelogue in the sentence
Use it in a big sentence.