求大牛指教一个sc问题，逗号和and能连接共用主语的两个动词吗

angelaff

GWD的一道题，因为看了曼哈顿，逗号和and不能连接共用主语的两个动词，所以首先就把A,D,E排除了

A scrub jay can remember when it cached a particular piece of food in a particular place, researchers have discovered, and tend not to bother to recover a perishable treat if stored long enough to have rotted.

A. tend not to bother to recover a perishable treat if

B. they tend not to bother recovering a perishable treat

C. tending not to bother to recover a perishable treat it

D. tends not to bother recovering a perishable treat      (D)

E. tends not bothering to recover a perishable treat it

这是曼哈顿的例句：
Wrong: Earl walked to school, AND later ate his lunch

Right: Earl walked to school AND later ate his lunch

Right: Earl walked to school, AND HE later ate his lunch.

可是，这题为什么选D呢？我在网上找了很久，没找到有人回答到这一点，那以后再看到这样的题，还按照曼哈顿的说法做吗？

求大牛指教，快崩溃了~

angelaff

顶起，求nn指教

wyw1018

researchers have discovered是插入语
其实我一直怀疑对and前面加逗号不连接省略和前面共用主语的说法

奔奔宝贝

researchers have discovered是个插入语，其前后要用逗号隔开，很明显前后两个都是researchers的discovery。这个句子就是researchers have discovered that a scrub jay can remember when it cached a particular piece of food in a particular place and that it tends not to bother recovering a perishable treat.  我觉得吧，把researchers have discovered作为插入语、a scrub jay 作为主语的好处，就是省略了两个that，并且避免了后面的那一长串，读起来有停顿，不至于那么累——因为如果用后面那个句型的话，整句话就不能有逗号啦。做这道题你可以用排除法啊：C时态不对，AB和a scrub jay单复数不一致，DE就用bother doing/to do都对，但是E句末的it不对。

angelaff

哦，看来还是插入语的问题，把前后两个逗号都看做是为了加入插入语而使用的就好理解多了，多谢大牛指点~
我差点对曼哈顿失去信心了

enkyklios

我不大相信曼哈顿这个说法