stay,study的过去式

stay,study的过去式 stay.build.study的过去式? stay的过去式,和study的过去式 study、stay、practice、watch的过去式! study,stay过去式是什么? stay,study 过去式 写出它们的过去式：study、visit、stay、have、pratice. stay、build、stop、draw、study、lived的过去式 stay的过去式 play ,stay,的过去式 stay的过去式是什么 stay的过去式是什么? stay与study的过去式和第三人称单数,都是怎么变化的?并解释一下 thanks! look play clean go do visit stay study dance live stop shop 这些词的过去式. do study go clean stay visit have dont isnt 的过去式怎么写 go、work、come、have、find、help、study、fly、do、make、stay的过去式 写出stay spend sit see say write cry study stop practice 的单三式 现在分词 过去式 watch dance wash surf am stay carry study are want do动词的过去式