can i say
i went to the U.S yesterday
You're missing a full stop (or period if you're in the U.S.). So no, when using letters as an acronym or initialism, you need to either indicate the abbrev. with a termination mark such as a period or comma (which is vastly becoming more and more acceptable). Another acceptable use would be using all capital letters with no termination points, having the acronym all in capitals is now commonplace to provide the information that it is an ancronym and not a word (eg, USA).
|link comment||answered Jan 31 '12 at 17:59 Jamie Makepeace New member|