Look!Somebody has broken a glass.Well,it__ me.I__ that.A.wasn't;didn' doB.isn't;haven' doneC.wasn't;hadn't doneD.isn't;didn't do为什么前面一个空格用现在时呢?后面的为什么用助动词呢?
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Look!Somebody has broken a glass.
Well,it__ me.I__ that.
A.wasn't;didn' do
B.isn't;haven' done
C.wasn't;hadn't done
D.isn't;didn't do
为什么前面一个空格用现在时呢?
后面的为什么用助动词呢?
第一个空说明这件事我没做过,刚才没做,现在也没做,所以用isn't.
第二个空是说打碎玻璃这件事不是我做的,事情已经发生了,表示过去某个时间发生的动作.
为什么不用现在完成时是因为:现在完成时是表示过去发生的动作对现在造成的结果或影响常和already,yet,just,ever,never,before,连用,也没有要持续的意思.所以不用现在完成时.
用了助动词,你记住一点:没有be,就要加助动词,就可以了.
第一个用现在时表示始终是这个状态,即习惯的动作
第二个用助动词表否定,didn't do第二个为什么不能用现在完成时呢,代表我过去没有做这件事啊,麻烦啦,真的不懂这里并不表示对现在造成的影响。强调对现在造成的影响采用现在完成时。 如:I have seen the film before.(如果这样说,就暗含我了解这部电影的内容之意)...
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第一个用现在时表示始终是这个状态,即习惯的动作
第二个用助动词表否定,didn't do
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