I did not go to bed until I finished my homework (我直到完成作业才睡觉.not前加系动词,它表示的动作发生在 until引导的从句前.
She won't know until I tell her.
We can not work until midnight.
这是我的英语老师课上讲的例句
He has not gone to bed until his mother come back.
I don`t know what happened until you tell me.
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