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： live— lived 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 cry- cried 不规则动词的变化：原形过去式原形过去式原形过去式原形过去式原形过去式win won sweep swept teach taught have had go went wear wore keep kept think thought do did find found Sell sold sleep slept buy bought eat ate Say said send sent feel felt drink drank is/am was take took lose lost read read give gave are were mean meant become became put shut put shut sing sang drive drove meet met fall fell cut cut begin began speak spoke make made Leave left fly flew run ran ride rode come came Spend spent draw drew sit Sat hear heard tell told grow grew learn learned/ learnt get got know knew 1
写出下列动词的过去式is\am_________ fly_______ plant_____
