一道语法题

jojofgasw

the limousine driver has waited for almost an hour before deciding his client was not going to show up.

1.the limousine driver has waited for almost an hour before deciding

2.the limousine driver waited for almost an hour before deciding

3.the limousine driver has waited for almost an hour before he decided that

4.the limousine driver was waiting for almost an hour before he decided

5.the limousine driver waited for almost an hour before deciding that

answer is 5, before doing ? 总觉得别扭，过去的事嘛，为什么用动名词，哪位NN给解释一下

himba

decide后面是一个从句，that不能省略，排除A, B, D.

C的时态完全改变了句义，司机在认为客户不出现之后又等了一个小时。so only E is correct.

before doing ? 总觉得别扭，过去的事嘛，为什么用动名词

这里是分词，不是动名词。before deciding就是before he decided。

before加分词，很常见。