Because I <b>was</b> late, I missed it<br/><br/>Because of <b>being</b> late, I missed it.<br/><br/>"Because I <b>was</b> late" can be rewritten to "Because of <b>being</b> late"? Then how can we know <b>being</b> comes from '<b>was</b>' or '<b>am</b>'?<br/><br/>Thank you so much in advance.