all these last few days,we have been busy fighting drought.为什么要用have been busy fighting ,请详解,
问题描述：
all these last few days,we have been busy fighting drought.
为什么要用have been busy fighting ,请详解,
答
表示这些日子以来我们一直……
答
因为这个句子的时间状语是all these last few days（这几天以来），表示一个持续的时间段，所以要用现在完成时。
答
have been busy fighting drought中有两个语法点：
首先,你需要知道固定搭配be busy doing something ,意思是“忙于做某事”；
然后,have done是现在完成时,表示从过去一直做到现在,而现在的状态是已经完成了这件事情.
望采纳.