He----(not go) to bed until 12 o'clock.要解析
问题描述:
He----(not go) to bed until 12 o'clock.要解析
答
didn't go
实义动词作谓语的否定句要加助动词,根据句意‘他直到12点才睡觉’ 动作已发生,故用一般过去时.