understand的过去式

understand的动词过去式 understand的过去式是什么? understand的过去式是什么 understand的过去式 understand的过去式 understand的过去式和过去分词 understand的过去式和过去分词是什么? 初一英语过去式contain hate smell believe belong think see mean like taste understand love的过去式? stand的过去式和完成式是一样的么?stand的过去式是stood,完成式呢?那么understand是否同理? say,lose,meet,read,take,see,speak,swim,drink,understand的过去式和过去分词 find,give,lose,meet,read,say,see,speak,swim,take,understand,的过去式? go lose meet read see speak swim take understand的过去式? go lose meet read see speak swim take understand的过去式? comprehend跟understand异同语境、用法、异同、例句,以及他们的过去式是什么? 请告诉我几个英语单词.die过去式和过去分词.和himeself一样的反身代词.send过去式和过去分词.leave过去式和过去分词.understand过去式和过去分词. 下列词的过去式,mean,meet,ride,ring,sell,send,shine,sing,sink,speak,spend,take,teach,tell,think,understand,wake,wear,win的过去式 do build break buy come give write understand run have 的过去式,过去分词以及相应的汉语 He said he couldn't understand people who talked fast,为什么用过去式?这样的句式有什么规律吗?