Answered By: Writing Center Last Updated: May 05, 2015 Views: 1
In formal contexts we can use while or whilst with a meaning similar to although to introduce something that qualifies what is said in the main clause or something that may seem to conflict with it. In this case, the while/whilst clause comes before or within the main clause, but not after it.
e.g.: The diesel model of the car, while/whilst more expensive, is better value for money.
Whilst is a rather literary word and some people avoid using it.
We can use while or whereas to say that something contrasts with something in the main clause. The while/whereas clause may come before or after the main clause.
e.g.: While/Whereas I always felt I would pass the exam, I never thought I would get an A grade.
We don't use whereas where what is said in the subordinate clause makes what is said in the main clause unexpected.
e.g.: While (not Whereas) her father is from Spain, she doesn't speak Spanish.
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