For forty years Jane Goodall has been outspoken about making the rest of the world understand and respect the life of these animals.
1.has been 是is 的现在完成时,那么 be动词时有完成时态的?
2.about介词短语充当什么状语呢?
be动词有完成时态,例如:I have been here for three years. 我来这里已经3年了。
is完成不就是be完成?楼主是不是想问完成进行体?比如, You are being lazy ,进而变为, You have been being lazy.(最近一段时间很懒),我认为理论上有,实际上没有,been being,不好发音,实际上很少见。about开头的介词短语是作形容词补足语。