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I have studied English
future
the Present Perfect Tense
I studied English in 2014.
2014
for 5 years
/since 2014.
▲
now
2003
How long have I taught English?
?
…
I became a teacher
I have taught English for 16years
/since 2003/since I became a teacher.
▲
now
/three years ago
2016
How long has he played badminton?
?
…
He has played it for 3years.
/since 2016.
▲
now
?
How long has he been a coach ?
He left NBA