请问这道关于时态的英语题目为什么选这个?—Hi,John,I have not seen you for a long time.What _______ recently?—Carrying on some research on wildlife.A.have you been doing B.have you done C.were you doing D.did you do 请问这道
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请问这道关于时态的英语题目为什么选这个?—Hi,John,I have not seen you for a long time.What _______ recently?—Carrying on some research on wildlife.A.have you been doing B.have you done C.were you doing D.did you do 请问这道
请问这道关于时态的英语题目为什么选这个?
—Hi,John,I have not seen you for a long time.What _______ recently?
—Carrying on some research on wildlife.
A.have you been doing
B.have you done
C.were you doing
D.did you do
请问这道题为什么选A不选B?
请问这道关于时态的英语题目为什么选这个?—Hi,John,I have not seen you for a long time.What _______ recently?—Carrying on some research on wildlife.A.have you been doing B.have you done C.were you doing D.did you do 请问这道
不管采不采纳,我的回答就在这里
A 的时态是现在完成进行时,他和B 的现在完成时的区别是,特别强调以后还要干吗
问句：好久没见,你最近在干吗
答语,我一直在从事野生动物的研究.（言下之意,我以前研究,现在研究,以后还要研究下去）
由答句可知 carrying on 的意思是‘在进行’ have you done 是强调已经做过 而have you been doing是强调一直做 强调状态。所以 选B项。
望采纳~