0Hi,02br 02br 00How are they different? Are some awkward if not incorrect?02br 02br 00We should notify him two days before his scheduled appearance.02br 02br 00We should notify him two days prior to his scheduled appearance.02br 02br 00Please notify him two days before his scheduled appearance.02br 02br 00Please notify him two days prior to his scheduled appearance. 0-
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— Avangi
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0Thank you.02br 02br 00When is it that the use of 'prior' or 'prior to' wouldn't not be an attractive substitute of the word 'before'? Could you give a couple of example sentences? 0-
0While "before" is a preposition, "prior" is an adjective, so you'd need to keep your wits about you when making substitutions. I wouldn't advise you to count on any rule of thumb at this stage, and I'd only be able to say whether or not a particular example works.02br 02br 00Think of the word "early," which is also an adjective. The comparative form, "earlier" is similar t
0Thank you, again.02br 02br 00You said/wrote:02br 02br 01i00The flight to Washington on [airline] XXXX leaves02i00 01i01u00before / earlier than / prior to02u00 the one on ZZZZ. 02i00(I guess you'd have to say that "earlier than" and "prior to" function as adverbs, while "before" still function
0IMHO "in advance of" implies a special relationship between *** and ZZ which does not in fact exist. It's probably coincidental that they depart the same airport.02br 02br 01i00The Secret Service team arrived 01u01b00in advance of02b02u00 the Presidential party, to set up observation posts, and to plan for the President's safety.