1.What do we got to show for it?
这句话不定式是what的定语还是目的状语?有点分不清楚。
2.Twelve enemy fighters had been brought down.
这是牛津词典的一个例句,句子是过去完成时的被动语态,但不是说用过去完成时要有个过去的时间参照吗?这句子没有过去时间参照为什么直接用了过去完成时?
3.Life on Earth developed using potassium, carbon, and calcium, but it could just as easily have been arsenic, silicon, and iron. To us, this looks like a machine, but on this planet, it could be an organism. 这句话有个as easily,但只有一个as,是不是后面省略了一个as从句?能不能补全呢?