be at work与 be at working有什么用法区别?

be at work与 be at working有什么用法区别?
at work （表示所处一种状态）1. (人)在工作,在干活(特指日常工作)2. (机器)在运转；(因素)在起作用；活动着3. 在工作的地方4. 从事于,忙于(某项工作)(与on或upon连用)
5.工作中
He had an accident at work.
他在工作中出了一次事故.
How are you doing at work?
你在工作方面进展如何?
They get on well at work but not privately.
他们工作上相处融洽,但私交不怎么样.
It is embarrassing to have someone looking over your shoulder while you're at work, as though you could not be trusted.
你工作时有人严密监视着,好像你不可靠似的, 这真叫人难堪.


be at working (表一种动作行为）

起作用,在上班；在起作用
All the astronaut should have the ability to work calmly and must be good at working as part of a team.
所有的宇航员都应该有冷静工作的能力和作为小组的一员,能够工作出色.

Before Blige developed the profile of a survivor, she was notable for being one of the first R. &B. singers to be at ease working with m.c.s.
在mjb变成一个幸存者的形象之前,她是第一个可以自如的和mcs一起工作的r&b歌手.

communication skills will be your forte, and you should also be adept at working alone along with the customary research and presentation know-how.
沟通技能会是你的优势,同时你也会擅长就外国习俗进行独立研究并知道怎么去介绍你的成果.