理工类辅导资料：时、体、态现在完成时与过去一般时
(1) Ive seen him this morning(还在上午的时间里)
I saw him this morning．(时间已过了上午)
(2) Whos opened the window? (窗户还在开着)
Who opened the window? (与现在无关，窗户可能已关上)
(3) Have you ever heard him sing?(他可能不爱唱歌)
Did you ever hear him sing?(你曾听过他唱歌吗?他可能是歌唱家)
(4) Have you ever heard of such a thing?(你听过这种事吗?)
Did you ever hear of such a thing?(这种事你听说过吗?这是一个修辞性问题，表
表示惊异。
(5) What have I done to make you so angry? (对方仍生气)
What did I do to make you so angry? (暗示某一过去的时间，可能对方已不生
气了。
(6) How has he done? (他这活干得怎么样?强调结果)
How did he do it?(他是怎么干这活的?强调干活的方式)
(7) He has lived in NewYork for eight years．(他仍在纽约)
He lived in NewYork for eight years．(他可能不在纽约了)
(8) He has been called a thinker．(强调事实)
He was called a thinker．(他曾被誉为思想家。)
(9) Youve heard what I said．(你听见我的话了。)
You heard what I said．(你是听见我的话的。口气严厉，具有感情色彩)
(10) Ive lost my pen．(笔还没找到)
I lost my pen．(笔可能找到了)
(11) He has already been there．(曾去过那里)
He was already there．(当时在那里)
(12) Since I have been ill，my friend has visited me everyday. (生病还在延续)
Since I was ill，my friend has visited me everyday．(病已好了)
(13) Have you slept well?(暗示因疲倦休息后是否好些了)
Did you sleep well?(暗示睡得是否舒服，满意)