GWD 求教

david_sz

The Acoma and Hopi are probably the two oldest surviving Pueblo communities, both dating back at least a thousand years.

 

1. both dating
2. both of which have dated
3. and each has dated
4. and each one dating
5. each one of which date

答案是A, 我知道其他选项的错误，可是我觉得A选项的本身也是有问题的，我查阅了词典 Both 有3个词性。一个是形容词，比如I want to buy both windows. 还有一个是代词，就好比这句话。 可是我觉得代词是可以充当主语的那么这句话的dating 这个形式是怎么样的语法现象？

谢谢

zard

这个both是同位语，记得以前碰到过这样一个句子：each doing ....; 这个each和both是同一个用法。后面跟的doing是修饰both or each

david_sz

o 谢谢