When you have any mail to be picked up or your dog needs walking,he is your man.
问题描述：
When you have any mail to be picked up or your dog needs walking,he is your man.
为什么用any呢?any不是用在疑问句或否定句吗?
答
不必然；用在条件句也一样用 any 的.
If you have any question,raise your hand.
这句虽然以 when 起句,也可以比照着理当你有任何邮件要取或你的爱犬需要出去遛遛,他都是不二人选.
walk the dog 在国外意味着出去遛狗,让它上个厕所.