1)john (has become) a member of an idol group in 2011 
stevie (has built) a revolution device in 2000 
in+ 년도 과거라고 알고 있는데 위 문제 답 맞나요? 
2) i (left) the building 2 hours ago. 
ago 문제 과거라고 알고 있는데 답 맞나요? 
3)justin (has been) to hong kong many times since 2008 
since 문제 현재완료?과거완료 ? 인지 답 맞나요? 
4)joy driver license has been taken away after he was caught drunk driving.
has been 인지 had been 인지 ...
죄송합니다.^^


