not...until...引导的是什么从句

时间状语从句.
I won't sleep until you come back.本句是含有时间状语从句的主从复合句.
再问： i won't sleep是主句，you come back是从句？ 那如果I didn't sleep until 11 o'clock呢？
再答： 对。 I didn't sleep主句 until 11 o'clock时间状语。