2021年下半年大学英语四级语法用法辨析汇总　　not until/until两者皆可接延续性动词和暂短性动词.　　not...until指的是“直到...才”的意思,如 I did not go home until my mother called me.　　我直到我妈妈打电话给我才回家.　　not until的倒装与强调结构　　1.当Not until位于句首时,句子要倒装.其结构为:Not until+从句/表时间的词+助动词+(主句)主语+谓语+.如:　　①Not until the teacher came in did the students stop talking.直到老师进来学生们才停止讲话.　　②Not until next week will the sports meet be held.直到下周才开运动会.　　2. not until的强调结构为:It is / was not until+从句/表时间的词+that+.　　上面两句改为强调句为:　　③It was not until the teacher came in that the students stopped talking.　　④It is not until next week that the sports meet will be held.　　直到我结婚的时候,我才有钱买了自己的房子.　　It was not until I got married that I could afford to buy a house of my own.　　而until指“直到”.例如：　　Go alone the street until you see the traffic light.　　往前走,直到你看见交通灯.　　2021年下半年大学英语四级语法用法辨析汇总