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Thread: diff meaning of "in which","for which" , "on which" ...

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    diff meaning of "in which","for which" , "on which" ...

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    Hi all,

    Can anyone please explain the different meaning of
    in which, for which, of which, at which, on which , to which ?

    My guess is, these words have to be suited with the word in front of them.

    Ex. ...... extend to which.... , the rate at which.....

    Am I correct?

    But sometimes, I really can't choose a correct choice, for instance

    In an effort to reduce the number of fires started by cigarettes, a major tobacco company is test-marketing a cigarette in which thin layers of extra paper are used to decrease the amount of oxygen

    A. in which thin layers of extra paper are used to decrease the amount of oxygen
    B. for which thin layers of extra paper are used to decrease the amount of oxygen

    In this case, what is difference between "in which" and "for which"

    Highly appreciate,

  2. #2
    Eager! manne's Avatar
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    to difine the correct preposition, I usually just mentally read a word combination in reverse sequence:
    a cigarette in which thin layers = thin layers of paper in a sigarette
    a cigarette for which thin layers = thin layers of paper for a sigarette - illogical

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    Learning sumeet_rana's Avatar
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    agree with manne
    although the usage depends on the context.

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    in the given example ... A seems to be more appropriate .. for would have been good if the sentence was talking abt the cigratte for rich .. cigratte for poor etc ...

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    "which" is modify "a cigratte".
    After "in which" is an adjective clause.
    So, I think this way.
    1. thin layers of extra paper are used to decrease the amout of oxygen in a cigratte
    2. thin layers of extra paper are used to decrease the amout of oxygen for a cigratte
    Obviously, 1. sounds better.

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    Thanks a lot all

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