1、一般现在时: be动词有are/is 助动词有do/does
(1)一般 s
(2)以sh,ch,o,x,s结尾 es
(3)以辅y结尾的去掉y, ies
(4)不规则变化
(1)一般 s
(2)以sh,ch,o,x,s结尾 es
(3)以辅y结尾的去掉y, ies
(4)不规则变化
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