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:
Actually it's been kind of slow this week.
Use this to tell people something that's different from what they are expecting to hear, or unexpected:
"Actually," is really useful in situations where someone is doing something wrong and you want to correct them. 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.
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