几个英语句子帮忙解释语法
最近在读一些名著名篇,有几句话不懂它的语法结构,
1.the unpunctual man is always complaining that he finds no time to answer letters.为什么是always complaining而不是三单?2.unpunctuality is very harmful when it comes to doing one's duty.句中comes to doing,to 后面不应该加原形么,这种句子碰到好几次,不明白to怎么能跟doing