885-1-7,10,24

joywzy

以下是引用joice在2003-10-30 8:21:00的发言：
key word " during " , so  present perfect

What is the difference between during and in in the prep phrases?

Even i consulted the longman distionary ,I cannot get the exact meaning .

excellent

in two decades 谓语动词是一定用现在完成时吗？请执教！
那during two decades 和 for two decades 呢？

JerryGuan

此题，严重请教。


以前XDF老师讲的，我忘了。。。55555555

xx2004

我看了一下字典，没有说用during就要用完成时阿。本来没有做错，看了大家的讨论，反而糊涂了。头都大了，有没有高高手啊？救命！

星际浪子

XDF老师说过的，during/in 后面加大段的时间要用完成时态。

行缘

我觉得during/in并不能确定用现在完成时，如section01-6, within two years用一般现在，而within the passing two year, recently等才能确定用现在完成。而24题用现在完成的原因是因为主句表明的during的时间段是持续到现在的所以现在完成时。一家之言。

当当84

7.Even today, a century after Pasteur developed the first vaccine, rabies almost
always kills its victims unless inoculated in the earliest stages of the disease.
(A) its victims unless inoculated
(B) its victims unless they are inoculated
(C) its victims unless inoculation is done
(D) the victims unless there is an inoculation
(E) the victims unless inoculated
这里对unless的用法有点疑惑，刚刚查过字典，unless一定要连接完整的句子(s+v)那么这题的a,e除了使句子产生歧义之外，是否也存在着句子不完整的问题那？还是在unless后面将rabies省略了，即

rabies almost always kills its victims unless (rabies) inoculated...

不过既然是要求完整的句子，可以省略主语吗？

buenas

unless后面的they不是rabies，而是指病人。注意inoculate的意思是“给...接种疫苗，给...注射”，所以unless后面的they是不能去掉的。

unless后面应该跟句子，但有时可以省略主语（在不影响意思的情况下）

例：Do not leave unless instructed to do so.

 

问个白痴问题：

so...as to 和so...that的意思是完全一样的吗？

誓不低头的重生

indistingshable=not distinguishable 也有adj enough to do结构

为什么D不行

誓不低头的重生

麻烦请教一下第10题

Climatic shifts are so gradual as to be indistinguishable at first from ordinary fluctuations in the weather.

(A) so gradual as to be indistinguishable

(B) so gradual they can be indistinguishable

(C) so gradual that they are unable to be distinguished

(D) gradual enough not to be distinguishable

(E) gradual enough so that one cannot distinguish them

答案a 为什么D不行

indistingshable=not distinguishable 也有adj enough to do结构

indistingshable=not distinguishable 也有adj enough to do结构