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Anonymous Posted 12 years ago
Grammar

With which?

Hi teachers,

There is a sentence that I can't figure out its preposition usage. I think it was used with a relative pronoun (instead of "where").

Here is the sentence:

The research team were astonished by the speed with which fruit flies are able to change direction in mid-flight when faced with a threat.

Where does this with preposition belong to? Is this a prep. using with a relative pronoun as I said before? 

Thank you. 
  

Top answer

Anonymous Where does this with preposition belong to? It belongs with 'which'. Anonymous Is this a prep.

  • Anonymous Where does this with preposition belong to?
  • It belongs with 'which'.
  • Anonymous Is this a prep.
  • using with a relative pronoun as I said before?
  • Yes.
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4 Answers
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AnonymousWhere does this with preposition belong to?
It belongs with 'which'.
Anonymous Is this a prep. using with a relative pronoun as I said before?
Yes. It is common in formal English:

the speed with which fruit flies are able to change direction in mid-flight
The suitcase in which
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Thank you Mister Micawber

By the way, can we use use "where" instead of "with which" here?
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No. I cannot see an informal alternative there.

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