Essential and nonessential clauses
Some clauses can be ripped out of a sentence without changing the basic meaning of the sentence. A clause like this is known as a nonessential clause. Here’s an example of one:
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You can rip this nonessential clause out of the sentence and it still gets the basic meaning across that the tree fell down during the storm:
The tree fell down during the storm.
What the nonessential clause does is tell you some extra information.
An essential clause is the opposite of a nonessential clause - it can’t be removed without changing the basic meaning or message of a sentence.
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