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    #1

    'by' and 'for'

    You can substitute 'a' by/for 'b'.

    Hi,
    What's the correct preposition, please? Is there any rule for it?
    Thanks.

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    #2

    Re: 'by' and 'for'

    Quote Originally Posted by jctgf View Post
    You can substitute 'a' by/for 'b'.

    Hi,
    What's the correct preposition, please? Is there any rule for it?
    Thanks.
    substitute 'a' for 'b'
    This means you use 'a' (in the place)(instead) of 'b'.

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    #3

    Re: 'by' and 'for'

    thanks a lot, 2006.
    I had betted on 'by' and lost my money.
    I wonder when to use 'by' and 'for'. is there a rule, please?
    if I was talking about people, was it right to say 'substitute John for Mary'?
    also, would it be correct to say 'to exchange dollars for euros'?
    thanks again.

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    #4

    Re: 'by' and 'for'

    Quote Originally Posted by jctgf View Post
    thanks a lot, 2006.
    I had betted on 'by' and lost my money. I (had) bet

    If i was talking about people, was it right to say 'substitute john for mary'? yes
    Also, would it be correct to say 'to exchange dollars for euros'? yes
    Thanks again.
    I wonder when to use 'by' and 'for'. Is there a rule, please?
    This is a big topic.
    We just say "substitute for", not 'substitute by'.
    You could say, You can change it by replacing 'b' with 'a'.

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    #5

    Re: 'by' and 'for'

    Quote Originally Posted by 2006 View Post
    I wonder when to use 'by' and 'for'. Is there a rule, please?
    This is a big topic.
    We just say "substitute for", not 'substitute by'.
    You could say, You can change it by replacing 'b' with 'a'.
    Thanks a lot.

    I have 2 questions please:


    1) if the verb was ' to replace', which proposition (by/for) should I use, please?

    2) I am confused about the past of 'to bet'. My Oxford dictionary says that 'betted' is correct:

    bet
    verb (bets, betting; past and past participle bet or betted)

    I wonder if both are really possible but 'betted' is rarely used.


    Thanks again.
    Last edited by jctgf; 26-Nov-2008 at 22:32.

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    #6

    Re: 'by' and 'for'

    Quote Originally Posted by jctgf View Post
    thanks a lot.

    I have 2 questions please:


    1) if the verb was ' to replace', which preposition (by/for) should i use, please?
    there are two basketball players named bad and good.

    good will replace bad.. (no preposition)
    bad (will be)(was) replaced by good.
    the coach will replace bad with good.
    we need a repacement for bad.



    2) i am confused about the past of 'to bet'. My oxford dictionary says that 'betted' is correct:

    bet
    verb (bets, betting; past and past participle bet or betted)

    i wonder if both are really possible but 'betted' is rarely used.
    only "bet" is used where i am. Maybe "betted" is used elsewhere.

    thanks again.
    2006

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