Question

have been study 为什么不说have studied ,have been absent 为什么不说hav

Answer 1

1. have been study 是不存在的形式,你打错了吗?只会是have been studying(现在完成进行时)或者have studied(现在完成时)

2.have been absent(现在完成时)absent在这里是形容词,不可以用作过去分词.

3. How long has she been studying?是现在完成进行时,表示从过去开始的动作一直持续到现在,而且此刻动作仍在进行中或继续进行下去.