@ be是一个连系动词,它有自己不同的形式 .@ can是情态动词.@ do是助动词． 例句：.1 Mary's new dresses are colourful． 2 Can all the wonderful birds be found in our Bird Park．3Do you go to school every day?
@ be是一个连系动词,它有自己不同的形式 .@ can是情态动词.@ do是助动词． 例句：.1 Mary's new dresses are colourful． 2 Can all the wonderful birds be found in our Bird Park．3Do you go to school every day?