操作方法
一般在动词末尾加-ed 如：pull-pulled cook-cooked want-wantde wash-washde play-playde
结尾是e加d 如：taste-tasted love-loved like-liked hope-hoped dance-danced
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 plan-plannde
以“辅音字母+y”结尾的，变y为i， 再加-ed 如：study-studied cry-cried copy-copied
不规则动词过去式 如：am,is-was are-were do-did see-saw say-said give-gave get-got go-went come-came have-had eat-ate