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标题: 885-01-23 [打印本页]

作者: egretxm 时间: 2004-8-29 03:17
标题: 885-01-23

23. In 1980 the United States exported twice as much of its national output of goods as they had in 1970.

(A) twice as much of its national output of goods as they had

(B) double the amount of their national output of goods as they did

(D) double the amount of its national output of goods as it has（C）

(E) twice as much of their national output of goods as they had

请教两个问题 1, 这里A中的had 能否认为是had exported 的省略形式?

2, 1970 年的动作发生在1980年之前, 为什么不需要用过去完成时?

我对于一般时态和完成时态的选用总是很糊涂, 想得头痛, 多谢指点!

作者: egretxm 时间: 2004-8-29 03:23
请参看这题885-01-24
Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.
(A) Even though its per capita food supply hardly increased during
(B) Even though its per capita food supply has hardly increased in
(C) Despite its per capita food supply hardly increasing over
(D) Despite there being hardly any increase in its per capita food supply during
(E) Although there is hardly any increase in per capita food supply for
我也不明白为什么这里一定要用完成时态, 而不能选A.

作者: horsefish 时间: 2004-8-29 04:27

以下是引用egretxm在2004-8-29 3:17:00的发言：

23. In 1980 the United States exported twice as much of its national output of goods as they had in 1970.

(A) twice as much of its national output of goods as they had

(B) double the amount of their national output of goods as they did

(D) double the amount of its national output of goods as it has（C）

(E) twice as much of their national output of goods as they had

请教两个问题 1, 这里A中的had 能否认为是had exported 的省略形式?

OG里面有过类似的认为

2, 1970 年的动作发生在1980年之前, 为什么不需要用过去完成时?

我对于一般时态和完成时态的选用总是很糊涂, 想得头痛, 多谢指点!

完成时是过去的过去, 发生的事要对第一个过去有影响才用完成时.

作者: scots 时间: 2004-8-30 00:03

以下是引用egretxm在2004-8-29 3:23:00的发言：
请参看这题885-01-24
Even though its per capita food supply hardly increased during two decades, stringent rationing and planned distribution have allowed the People’s Republic of China to ensure nutritional levels of 2,000 calories per person per day for its population.
(A) Even though its per capita food supply hardly increased during
(B) Even though its per capita food supply has hardly increased in
(C) Despite its per capita food supply hardly increasing over
(D) Despite there being hardly any increase in its per capita food supply during
(E) Although there is hardly any increase in per capita food supply for
我也不明白为什么这里一定要用完成时态, 而不能选A.

"in two decades"，这是一个现在完成时的时间标志。。

作者: egretxm 时间: 2004-10-4 16:37

多谢楼上两位指点!

但是我还是不太明白:

horsefish说: 完成时是过去的过去, 发生的事要对第一个过去有影响才用完成时. ------ 就是说前面的事对后面的事有影响,对吧? 可怎么就叫有影响, 怎么样就没影响呢?

scots 说 "in two decades"，这是一个现在完成时的时间标志。------- 可是 那原文用during, 不要求一定用完成时啊.

情况longman 对during 的解释:

1
from the beginning to the end of a period of time
During the summer she worked as a lifeguard. He slept calmly during the early part of the night. Foxes remain hidden during the day.
2
at some point in a period of time
My father was killed during the war.

I mentioned the subject during our discussions at her Washington office.

作者: eSpirit 时间: 2004-10-4 19:34

以下是引用egretxm在2004-8-29 3:17:00的发言：

23. In 1980 the United States exported twice as much of its national output of goods as they had in 1970.

(A) twice as much of its national output of goods as they had

(B) double the amount of their national output of goods as they did

(D) double the amount of its national output of goods as it has（C）

(E) twice as much of their national output of goods as they had

请教两个问题 1, 这里A中的had 能否认为是had exported 的省略形式?

2, 1970 年的动作发生在1980年之前, 为什么不需要用过去完成时?

我对于一般时态和完成时态的选用总是很糊涂, 想得头痛, 多谢指点!

你可以试着把后面的句子补全试试，即：句子应为In 1980 the United States exported twice as much of its national output of goods as they had exported in 1970呢，还是应为In 1980 the United States exported twice as much of its national output of goods as they exported in 1970呢？

我想很明白，这里有明显的时间点表示动作发生在过去，所以应该是过去时才对。

作者: egretxm 时间: 2004-10-5 02:17

好像有道理. 但是我有点似懂非懂, 得去找些用过去完成时的例子对比一下, 哪位对时态尤其是过去时和过去完成时的区别比较清楚的朋友劳驾给详细讲讲, 谢谢了!

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