not...until强调句型的运用说明请看一道题:It was not __________ he took off his dark glasses __________ I realized he was a famous singer. A. when,that B. until,that C. until,when D. when,then此题选B。考查 not...until 的强调结构,其基本句型为:It is (was) not until (时间状语) that 从句(不用否定)他妻子走了之后他才来。正:He didn’t come until his wife left. 正:It was not until his wife left that he came. 直到雨停他们才出发。正:They didn’t start until the rain stopped. 正:It was not until the rain stopped that they started. 请做以下各题(www.yygrammar.com):1. It was not until midnight __________ the noise of the street stopped. A. that B. this C. since D. at which2. It was not _________1920 _________ regular radio broadcast began. A. for,that B. until,that C. for,when D. until,when3. It was not _________ you had explained how _________ I managed to do it. A. for,that B. until,that C. for,when D. until,when答案:1. A 2. B 3. B