Prep08-173

Skiptomynancy

The widely accepted big-bang theory holds that the universe began in an explosive instant 10 to20 billion years ago and has been expanding ever since.

A.   that the universe began in an explosive instant 10 to 20 billion yearsago and has been expanding

B.    that the universe hadbegun in an explosive instant 10 to 20 billion years ago and had been expanding

C.    that the beginning ofthe universe was an explosive instant 10 to 20 billion years ago that hasexpanded

D.   the beginning of theuniverse to have been an explosive instant 10 to 20 billion years ago that isexpanding   

E.    the universe to havebegun in an explosive instant 10 to 20 billion years ago and has been expanding

答案是A，请问has been expending[size=14.6666669845581px] 为什么不会造成跟前面big-bang theory holds[size=14.6666669845581px] 平行的confusion?

谢谢！

ukyo2003

不同时态也可以平行，不引起歧义就好。began是过去的行为，本题没有参照说需要在什么时间之前开始，所以不能用过去完成时；expand是直到今天还进行的行为，所以用现在完成时没有错。

Skiptomynancy

ukyo2003 发表于 2015-5-29 00:00
不同时态也可以平行，不引起歧义就好。began是过去的行为，本题没有参照说需要在什么时间之前开始，所以不 ...

Hello Ukyo2003， 感谢回复。

The.. Big-bang Theory holds that    the Universe began..... and has been expending....  

我之前的问题是， "and"后面的 "has been expending" 是否会造成歧义跟Big-bang Theory holds的并列，表示The ... Big-bang theory has been expending..

kiwifoodtown

Skiptomynancy 发表于 2015-5-29 08:39
Hello Ukyo2003， 感谢回复。

The.. Big-bang Theory holds that    the Universe began..... and has b ...

不会有这种歧义，除非真的是不看句子只看形式来作题的人会有这种想法。