情态动词使用方法归纳
一: can (could)旳形式和使用方法
一、 can, could
当表达“经过努力才得以做成功某事”时应用be able to,不能用Can。如:
1) 表达能力(体力、知识、技能)。
Can you lift this heavy box?(体力)
Mary can speak three languages.(知识)
Can you skate?(技能)
备注:此时可用be able to替代。Can只有一般目前时和一般过去式;而be able to则有更多旳时态。
eg: I’ll not be able to come this afternoon.
He was able to go to the party yesterday in spite of the heavy rain.


雷达卡




京公网安备 11010802022788号







