am are is be had has was were的用法口诀（am is are was were的用法口诀）

我用am,你用are,is用于他她它，复数都用are；be的样貌不起眼，富有内秀很百搭，过去时变was,were,现在时态is,am,are，完成时态再演been，火眼金睛记住它；have用在现在时，has是它单三式，主语单三分得清，只用has不发懵，had单薄本事大，过去完成都用它。