uy~have
I have had this cellphone for seven days .
come be
He has been here for several months .
begin be on
The class has been on for a quarter .
end be over
It is late for you to catch the film because it has been over for several minuter.
短暂性动词变延续新动词造句 就用常用的几个词 如：buy -have come-be begin -be on..