Understanding proper use of comma or no comma in a series


Thank you in advance for your help!  I'm trying to understand what rules of grammar apply to a particular sentence.  Here is the unruly sentence:


You may do A, but only if B or C happen to D.


My question relates to B.  Is the following interpretation of the above correct? You may do A, but only on two conditions: (1) if D happens to B or (2) if D happens to C.


What are the proper rules of grammar in this instance? Does the meaning change if a comma is placed before the "or"?


Thank you!

asked May 09 '13 at 13:41 Sam Christensen New member

0 answers

Your answer

Write at least 20 characters

Have a question about English grammar, style or vocabulary use? Ask now to get help from Grammarly experts for FREE.