Grammar: have been

have been = was + am + possible future

This

grammar is almost always used with "lately"

*****

subject + have been + adjective
주어 + have been + 형용사

I have been tired.
(lately) i was tired + i am tired + i might be tired in the future
Sarah's (Sarah has) been sick.

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subject + have been + verb-ing
주어 + have been + 동사

I have been eating too much.
(lately) I was eating too much, I am eating too much, I might continue eating too much
They've been fighting a lot.

Practice:
ex) I am tired. -----> I have been tired.

1. She was angry.
2. He's working too much.
3. My friend was busy.
4. We are swimming.
5. I am trying to lose weight.