Student or Learner
You can substitute 'a' by/for 'b'.
What's the correct preposition, please? Is there any rule for it?
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'?
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:
■verb (bets, betting; past and past participle bet or betted)
I wonder if both are really possible but 'betted' is rarely used.
Last edited by jctgf; 26-Nov-2008 at 21:32.