英语改错并说明原因
问题描述：
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?
答
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