高中定语从句：The drunk driver is to blame for the traffic jam ___ yesterday.A. that occured B. occured选A.为什么不能省略that?
问题描述：
高中定语从句：The drunk driver is to blame for the traffic jam ___ yesterday.
A. that occured B. occured
选A.为什么不能省略that?
答
高中定语从句：The drunk driver is to blame for the traffic jam ___ yesterday
.A. that occured B. occured选A。为什么不能省略that?因为that是关系代词，引导一个定语从句。 that = the traffic jam
答
that occured yesterday是做 the traffic jam的定语从句.并且that 做的是从句中的主语,此时做主语是不能省的,不然句子中具有两谓语动词,一个句子中是不能出现两个谓语动词的.只有当that 作宾语时才可省.