The London fire in 1644 lasted three months ( ) it died out.

answer Buntil和before的区别：until/not until是指：直到什么时候为止。。。其中非延续性动词用后者,延续性动词用前者。例句：Not until my father came back did I fell asleep。I was awake until my father came back。注意：倒装时倒装主句,从句语序不变。改为强调句时基本语序不变。before在。。。之前,常用在时间状语从句中。常用句型：It is +( )+before。。。注意：前后时态要一致,遵从主将从现原则。翻译：1。。。就。。。It was not long before he turned against his country。不久他就背叛了他的祖国。