Question

英文问题求解。。。选哪个，为什么请从语法上讲一下选择的原因谢谢啊

——————，it immediately ran away
A. observing her B.on being observed C.having been observed D..on her being observed

Answer 1

选 C.having been observed

整句的意思是： 已经被发现的它 立刻跑掉了！
it它 在这句话中是被发现的， 要用被动语态， 此其一。其二， 这里表达的意思是 已经被发现，已然发生的情况， 最好用现在完成时， 所以 选C !

Answer 2

B.on being observed 介词短语作状语= as soon as it was observed, it immediately ran away.上被看到它马上逃跑。

Answer 3

B
这句话考了两个结构：1.on+doing. 一.....就
2.非谓语动词。主语是it.主语和observe之间是被动的关系，所以要用被 动。
翻译为：它 一被看到，就立刻逃跑了。