James Naismith was Canadian.怎么was后面不加a呢?

James Naismith was Canadian.怎么was后面不加a呢? James Naismith was Canad是什么意思 James Naismith once was made______ (invent) some games which 为什么was后面动词可以加ing或者加ed?什么情况was后面动词加ing?什么情况was后面动词加ed呢? 英语翻译Tom was a Canadian boy,who was sent to a boarding school there was a time 后面加when还是while 英语翻译James Dean was a symbol of the new generation James liked fishing,---------A.but hunting was also enjoyed 英语阅读题!During his life,Dr.James Naismith worked as a doctor,t A Canada doctor,James Naismith,invented basketball（改为被动语态） During his life Dr James Naismith worked as a doctor, taught all you had to do was think a little harder ,was后面为什么加think的