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动词过去式变化规则:1一般在动词末尾加-ed,如:pull-pulled, cook-cooked2结尾是e加d,如:taste-tasted3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-stopped4以“辅音字母+y”结尾的,变y为i, 再加-ed,如:study-studied5不规则动词过去式:am,is-wasare-weredo-didsee-saw say-saidgive-gave get-got go-went come-camehave-hadeat-ate take-tookrun-ran sing-sang put-put make-maderead-readwrite-wrote draw-drewdrink-drankfly-flewride-rodespeak-spokesweep-swept swim-swamsit-sat