“Actually it's been kind of slow this week.”
You're talking with someone you know who works in another part of your company. She asks if you've been busy lately. You're not busy, so you say this.
Actually it's been kind of slow this week.
Use this to tell people something that's unexpected or different from what they are expecting to hear:
"Actually," is really useful for correcting people. For example, if you're putting a puzzle together with someone and they put a piece in the wrong place, say:
Actually, the blue piece goes over here.
Use "has been___" or "have been ___" when you're describing a situation that started at some time in the past and is still continuing now:
Sales have been pretty good.
It's especially common to use "has been ___" with "this week", "today", "this year", or other phrases that indicate the current time period:
I've been worried about this all day.
Describing a situation as "slow" means that it's not busy:
It's really slow today.
We've had a really slow month.