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Supercat Posted 10 years ago
Grammar

Comma+which

My book says

A date or event occurs which causes the trigger routine to run.

The trigger rountine runs, which activates the payload routine.

But what's the difference between no comma + which and comma + which?

The two examples shares 'the trigger routine', but it is irrelevant with each other in them. 
  

Top answer

e. it tells us which thing is meant. e.

  • e.
  • it tells us which thing is meant.
  • e.
  • it gives more information about something that has been mentioned.
  • However, there is another issue here, namely whether "which" refers to a noun or to a whole statement.
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2 Answers
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Without the comma, "which" is defining, i.e. it tells us which thing is meant. With the comma, "which" is non-defining, i.e. it gives more information about something that has been mentioned. However, there is another issue here, namely whether "which" refers to a noun or to a whole statement. In your first sentence, "which" refers to the noun "date" or "event". In the second sentence, "which" ref
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Thank you, GPY. You're awesome. I hope many people will read this post.

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