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Unclehamz Posted 14 years ago
Grammar

Which,

I don't know when to use "for which", "by which", "at which", "inwhich". Can someone explain how to use these in a sentence and when to use it?
  

Top answer

Use them for very formal prepositional subjuncts: This is the occupation for which I was trained. = This is the job I was trained for. This is the timepiece by which I judge the hour.

  • Use them for very formal prepositional subjuncts: This is the occupation for which I was trained.
  • = This is the job I was trained for.
  • This is the timepiece by which I judge the hour.
  • = This is the watch I tell the time by.
  • This is the location at which we will meet.
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5 Answers
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Use them for very formal prepositional subjuncts:

This is the occupation for which I was trained. = This is the job I was trained for.
This is the timepiece by which I judge the hour. = This is the watch I tell the time by.
This is the location at which we will meet. = This is the place we'll meet at.
This is the container in which I keep my toupee. = This is the box I
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" By which"/ by means of wich is ued to refer to a device or a process in technical communication.
" at which" is used to refer to a place/ temperature
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It depends on whether you would normally use "for", "by, "at" or "in" in the sentence. The phrases you listed are how we avoid ending a sentence in a preposition, which you technically shouldn't do in English, and there are lots of others too -
Over which, under which, on which, of which, etc etc

Remember though, that it's very formal, and most people would never talk like that excep
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Anonymousending a sentence in a preposition, which you technically shouldn't do in English,
No, that is no longer a valid rule. Both ways are equally acceptable. As you say, one is more formal.

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