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3bI has lived in downtown Kunshan twice.
in the exact past
from past to the present
the other day
yesterday the … before …
last … … ago
in… (past month/ year)
on… (past date/ weekday/ part of a day)
so far
up to now
till now
until now
since …
1a
I went to Qiandeng
14 years ago.
1b
I have lived in Qiandeng
since 14 years ago.
14 years ago
14 years
go
live
live
2004
2004
2b
I have bought a new iPad.
talk about the result of an action
It may have just happened or happened some time ago.