I have been

I've been pretty tired lately.

Sorry, I've kind of been in my own little world lately.

Have you been going to the gym a lot lately? You look great!

This phrase appears in these lessons:
* “Sorry, I've kind of been in my own little world lately.”
* “I've been feeling kind of lightheaded lately whenever I stand up.”


https://learnenglish.britishcouncil.org/en/english-grammar/verbs/verb-phrases