写出下列动词的第三人称单数形式，动词ing的形式和过去式

三单：does cleans visits studies practises has
stays reads goes watches cooks

ing:doing
playing
cleaning
visiting
studying
practicing
having
staying
reading
going
watching
cooking

过去式： did played cleaned visited studied
practiced had stayed read goes
watched
cooked

单三：do--does play--plays clean--clean visit--visit study--studys practice--practices have--has stay--stays read--reads go--goes watch--watches cook--cookes
现在进行时：doing playing cleaning visiting studying practicing
having staying reading going watching cooking
过去式：did played cleaned visited studied practiced had stayed read goes watched cooked

三单：does plays clean visit studys practices has
stays reads goes watches cookes
现在进行时：doing playing cleaning visiting studying practicing
having staying reading going watching cooking
过去式：did played cleaned visited studied practiced had stayed read goes watched cooked