Read this sentence 'This letter is valid for a one time treatment only'. Do we need to put 'a' if we have put 'one' or can we write 'a one-time treatment'? Could you please advise?
Last edited by Woongmf; 30-Oct-2013 at 09:24. Reason: typo
The "a" is correct but the sentence is a little unnatural. I would just say "This letter is valid for one treatment only".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.