it is not ethical to tell a lie
Many people do not think it is ethical to use animals in experiments for scientific purposes.
The business practices ethical decisions.
sentences of ethical proverbs
All health care professionals are held to a high standard of ethical principles.
It is not ethical to plagiarise sentences from the Internet and pass them off as your own work.
"How do you use Mesozoic era in a sentence." Is a sentence using the words.
use insubordination in a sentence
how do you use enfranchise in a sentence?
use spoil in a sentence
We use are when the sentence is in plural and is when the sentence is in singular form.
In using a knife, use the part of the blade. = an imperative 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.