Question

SAT语法题

The Pony Express was an ingenious system for
carrying mail; it was in existence only briefly,
however, before the telegraph system made it
obsolete.
(A) mail; it was in existence only briefly,
however,
(B) mail, for it was in existence only briefly,
however,
(C) mail; however, existing only briefly
(D) mail, having existed only briefly
(E) mail, but was existing only briefly

为什么不选D呢

Answer 1

The Pony Express was an ingenious system for carrying mail， having existed only briefly，however, before the telegraph system made it
obsolete.
-------你好，如果选D,having existed这个动作就会修饰它前面的mail,明显不对，因为各种各样的mail今天仍然存在，而不是having existed only briefly。

追问

那如果把having那一句提到开头对不对呢

追答

Having existed only briefly ,the Pony Express was an ingenious system for carrying mail ,however, before the telegraph system made it
obsolete.----------最好去掉however,这样就对了。

追问

你是教SAT的吗？
常规语法是没问题了
SAT中好像默认having这样的句型要满足因果关系的。

追答

我教高三和新东方的。英语是非常灵活的，没有你所说的----这样的句型要满足因果关系。一切从实际出发。

追问

可以加qq吗 我想跟你细聊一下

追答

我没有QQ. 你发短信吧：13301817173

Answer 2

选A，D项少主语