第三人称单数形式和现在分词和过去式

stay，have，drink，buy , pack

为你解旅物答。

第三粗辩人称单数形岩镇缺式现在分词过去式
stay - stays - staying - stayed
have - has - having - had
drink - drinks - drinking - drank
buy - buys - buying - bought
pack - packs - packing - packed

stay- stays -staying- stayed
have-has-having -had
drink -drinks-drinking-drank
buy-buys-buying-bought
pack -packs-packing-packed