You are asking for an explanation, with examples, of most of the forms of HAVE and BE. There is no way in which we can cope with that in this forum. Any intermediate course book or student's grammar will give you several pages on this.[STRIKE]i[/STRIKE] I want the difference betw[STRIKE]w[/STRIKE]een has, had, have bee[STRIKE]b[/STRIKE]n, had been, was
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