29 ___ (catch) the last bus,he had to go home by taxi.为什么用NOT having caught 不用Not have caught.

分类: 作业答案 • 2022-01-09 18:05:21

问题描述：

答

NOT having caught 是完成时的分词形式.
NOT having caught the last bus是从句所以不能独自成句,也就不能用Not have caught,只能用他的分词形式NOT having caught .