He is always complaining to me about his fate.为什么要加is?
问题描述：
He is always complaining to me about his fate.为什么要加is?
答
他总是向我抱怨他的命运。
is 与后面的complaining 构成现在进行时，表示某个事情一直在持续
答
表示厌恶语气，感觉现在还在抱怨一样。
答
be always doing 表达说话人的某种态度.
可以是赞赏、厌恶、憎恨等.
如：He is always helping others.
My deskmate is always asking me for something.