把下列单词（过去式）分别变为它的原形、第三人称单数形式、现在分词/ing形式.过去式→原形→第三人称单数形式→现在分词/ing形式 asked→ → → did→ → → was→ → → studied→ → → went→ → → played→ → → watched→ → → stayed→ → → visited→ → → cleaned→ → →

asked-ask-asks-asking
did-do-does-doing
was-be-is-being
studied-study-studies-studying
went-go-goes-going
played-play-play-playing
watched-watch-watches-watching
stayed-stay-stays-staying
visited-visit-visits-visiting
cleaned-clean-cleans-cleaning

ask--asks--asking. do--does--doing. is study--studies--studying. go--goes--going
play--plays--playing watch--watches--watching stay--stays--staying visit--visits--visiting
clean--cleans--cleaning

asked ask asks askingdid do does doingwas be is beingstudied study studies studyingwent go goes goinhplayed play plays playingwatched watch watches watchingstayed stay stays stayingvisited visit visit...