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Yzh1978 Posted 11 years ago
Grammar

Punctuation

I open the door when I hear a cry.
I open the door , when I hear a cry.

Is the first one right ? Is it necessary to put a coma before the conjunction “ when”?
Thank you!
  

Top answer

yzh1978 Is it necessary to put a co mm a before the conjunction “w hen”? No. You should not use a comma there.

— CalifJim

  • yzh1978 Is it necessary to put a co mm a before the conjunction “w hen”?
  • No.
  • You should not use a comma there.
  • Use a comma between clauses when you reverse the order: When I hear a cry , I open the door.
  • CJ
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3 Answers
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yzh1978Is it necessary to put a comma before the conjunction “when”?
No. You should not use a comma there. Use a comma between clauses when you reverse the order:

When I hear a cry, I open the door.

CJ
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Thank you. I found this on the internet:
Coordinating conjunctions connect words, phrases, or clauses of equal rank.
The precise use of conjunctions is important for effective writing. (Note the use of a comma before a coordinating conjunction that joins two independent clauses.)

Therefore, conjunctions except coordinating ones don't need a comma before it such
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These are the three patterns.

independent clause COMMA [and / but / or / ...] independent clause
independent clause [when / while / before / after / until / ...] dependent clause
[when / while / before / after / until / ...] dependent clause COMMA independent clause

CJ
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