He can swim.
英语共有十六种时态,其表现形式如下(以study为例)
一般时 进行时 完成时 完成进行时
现在 study be studying have studied have been studying
过去 studied be studying had studied had been studying
将来 will study wil be studying will have studied will have been studying
过去将来would study would be studying would have studied would have been studying
A thing of beauty is a joy for ever.美丽的事物所带来的快乐无止无休.
for ever 永远 ;总是 短语 =for kepps /for all time