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*He has come to Beijing for two years.
He has been in Beijing for two years.
*He has bought that book for three weeks.
He has had that book for three weeks.
*He has joined the Army for one and a half years.
He has been in the army for one and a half years.
It is two years since he came to Beijing.
It is three weeks since he bought that book.
It is one and a half years since he joined the Army.
*His grandma has died for nine months.
His grandma has been dead for nine months.
It is nine months since his grandma died.
含有for，since的现在完成时的用法歌诀: 过去的动作或状态，一直持续到现在，for、since 把时间带。
非延续性动词用于完成时态，在肯定句中不能与for 或 since引出的短语(或句子)连用，但在否定句中是可以的，因为一个非延续性动词一旦被否定即成为状态，而状态总是可以延续的。如：
I haven’t seen him for a long time.
我很久没见到他了。
He hasn’t come here for some time.
他有段时间没来了。
I haven’t heard from her since she left.
自她离开以后，我一直没收到她的来信。
瞬间性动词 延续性动词 come — be (in)
buy — have
borrow — keep
leave — be away
die — be dead
stop — be over
begin / start — be on
open ---- be open
close ---- be closed
put on — wear