be in
join是终止型动词 be in和be on是延续型 系表词组 join的延续性动词 可以用 be in和be on in和on 的用法 要看 后面的 介词宾语, 加入某种组织要用in. 如army, party, club等 he has been on his school team for two years. he has been in the army for two years.
be a member of / be in是join的延续性动词 join 和join in是“参与”和“加入”,意义是不同的
瞬间动词,我还没听谁说过I've been joining the part for ten years.
不是.He joined the club three years ago.----He has been in the club for three years.-----He has been a member of the club since three years ago.瞬间动词改成延续动词 borrow---keep buy----have begin---be on 有些动词本身是延续的:如:wait, run,sleep
become-beenjoin-been inarrive-been inleave-been awaybuy-hadborrow-kept
应该是 join in吧其持续动词是:be a/one member of例如:He joined in the army in 2000.= He has been a member of the army for 10 years.
join- be in begin- be on fall asleep- be asleep borrow- keep
have been in
他们都是瞬间动词