The Difference Between “That” and “Which”

rogersgeorge on October 16th, 2017

I usually ignore things like grammar checkers, but Microsoft Word’s grammar checker happens to be pretty good at this distinction. I should add that we have lots of uses for both words, but today we’ll look at only one use. Here’s the rule:

Use “that” in restrictive clauses.
Use “which” in non-restrictive clauses.

Whatever that means, right?

Restrictive means the information is necessary. Non-restrictive means the information is added info; an aside or parenthetical remark.

Restrictive: The list includes an account that has been set up in the general ledger.

Non-restrictive: The list includes uncollected funds, which is what distinguishes this list from the collected balance.

I should add that you need to use a comma before this usage of “which” to show that the remark is parenthetical.

Here’s an example:

We set up an account that includes uncollected funds, which is what distinguishes it from a collected balance account.

A good exercise is to watch for this construction in your daily reading. You will see a lot of people using “which” when they should use “that.” They’re being pretentious. Don’t you be pretentious.

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