Approximate ages in my early twenties [21-23]. in their mid-fifties [54-56]. in her late seventies [77-79]. nearly/almost eighty [he's probably 79]. approximately/roughly. [about…

Sure! Here are examples using the age approximations you provided:

1. In my early twenties (21-23):
   "When I first started college, I was in my early twenties, just figuring out what I wanted to do with my life."

2. In their mid-fifties (54-56):
   "My parents are in their mid-fifties now and are starting to talk about retirement plans."

3. In her late seventies (77-79):
   "My grandmother is in her late seventies and still enjoys going for long walks in the park."

4. Nearly/almost eighty (he's probably 79):
   "Mr. Thompson, our neighbor, is nearly eighty; he still drives and goes fishing every weekend."

5. Approximately/roughly (about 30 / more or less 30):
   "There were approximately thirty people at the meeting, which made it easy to have a discussion."

Feel free to ask if you need more examples or any other information!