题目

英语改错并说明原因
Helen left her key in the office,so she had to wait until her husband come home.
改成coming不行?util后面接的是从句?从哪可以看出是个从句?

提问时间：2021-03-02

答案

Helen had left her key in the office,so she had to wait until her husband come(came) home,coming不行,until 后面是一个主谓结构的完整的句子,用 until连接就成了整个的从句