OG12 SC33 呼叫DUKB24 大神 求回复

cinderellaandme

最后，Ron对问题”能否将 has sent 改为 sent 的回答：

in short, the use of has + VERBed here signifies "past event with some tangible impact on the present". both of these things can satisfy that description, so both appear as has + VERBed.

this is certainly not the only way this sentence could be written; it just depends on context. that is, the current sentence is written from a present point of view -- but there's no good reason why it couldn't also be written from another point of view.

for instance, if we simply wish to relate both of these as past events -- without implying that either has any kind of impact on the present -- we could also write

             Because an oversupply of computer chips sent prices plunging, the manufacturer announced that it would cut               production by closing its factories for two days a month.

(note that "will" must also be changed to "would", because now we're talking about something that was a future event from the past standpoint of the sentence.)

总结：两者都正确。
正确答案中 两个情况都对现在产生了影响，因此可以使用has +verb ed;
但如果不想表示这两个活动对现在的影响，则可以用过去时。

超级玛丽lin

cinderellaandme 发表于 2013-9-9 15:39
刚刚正好读过Ron对相同问题的解释，Po上来，自以为讲得很是明白啦。

首先，Ron对 现在完成时 has+ verb-ed ...

讲的很清楚，谢谢~