When we talk about situations (general characteristics or circumstances) that exist until the present, we often use either the present perfect simple or continuous:
“Where is Dr Owen’s
office?” “Sorry, I don’t know. I haven’t been working here for long.”
(or I haven’t worked here
for long. Present Perfect Continuous emphasizes the activity of working; Present Perfect Simple emphasizes the state of having a job.)
We’ve been looking forward to this holiday
for ages. (or We’ve looked forward to … . Present Perfect Continuous emphasizes a mental
process; Present Perfect Simple
emphasizes a mental state.)
Source: HEWINGS,
Martin. Advanced Grammar in Use. Second Edition. United Kingdom: Cambridge, 2005.
Page 12.
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