not...until什么意思、怎么读？单词用法、记忆法、发音音标、反义词辨析、词语翻译、例句造句

not...until 音标：[]

直到…才；

not...until用于强调句型的用法

有这样一道考题，其中涉及了 not…until… 句型：
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 (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.