一般现在时中动词+s变化规则如下:
一般情况下,直接加-s,如:cook-cooks, milk-milks
2.以s. x. sh. ch. o结尾,加-es,如:guess-guesses, wash-washes, watch-watches, go-goes
3.以“辅音字母+y结尾,变y为i, 再加-es,如:study-studies
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