walk的过去式
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walked

动词过去式变化规则：

1．一般在动词末尾加-ed,如：pull-pulled,cook-cooked

2．结尾是e加d,如：taste-tasted

3．末尾只有一个元音字母和一个辅音字母的重读闭音节,应双写末尾的辅音字母,再加-ed,如：stop-stopped

4．以“辅音字母+y”结尾的,变y为i,再加-ed,如：study-studied

5．不规则动词过去式：

am,is-was,are-were,do-did,see-saw,say-said,give-gave,get-got,go-went,come-came,have-had,eat-ate,take-took,run-ran,sing-sang,put-put,make-made,read-read,write-wrote,draw-drew,drink-drank,fly-flew,ride-rode,speak-spoke,sweep-swept,swim-swam,sit-sat ...

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