高考英语一轮复习精品课件《Module 1 Deep South》（外研版版选修8）_高考复习指南

高考英语一轮复习精品课件《Module 1 Deep South》（外研版版选修8）

　　知识要点要点三

　　句式 Not until the late 18th century did the British explorer James Cook cross the Antarctic Circle,but he never saw land. 直到18世纪末，英国探险家詹姆斯·库克才穿越了南极圈，但他却从未发现任何陆地。这是一个倒装句结构，相当于The British explorer James Cook didn’t cross the Antarctic Circle until the late 18th century, but he never saw land.。Not until+时间状语从句置于句首，主句要用部分倒装结构。句型：not until...did+主语（倒装句）直到……才……。知识要点归纳拓展 (1)not until置于句首时，主句用部分倒装。即将助动词/系动词/情态动词放在主语的前面。但如果not...until连接的是含状语从句的复合句，用于倒装语序时，只倒装主句部分，从句部分(即until后面的从句)不倒装。 (2)在含有not...until的句型中，在对until引导的从句进行强调时，要将not until放在一起加以强调，构成“It is/was not until...that...”句式。（3）在句型“主句+until/till+时间状语从句或状语”中，尤其应注意以下几点：主句中动词是非延续性动词，如leave,graduate,break等时，必须用否定形式。主句中动词是延续性动词，肯定、否定形式都可以，但意义完全不同。知识要点例句：Not until 8:00 did he get down to doing his homework.=He didn’t get down to doing his homework until 8:00. =It was not until 8:00 that he got down to doing his homework.(强调句型）直到8点钟他才开始做作业。 You don’t leave until he comes back. 他不回来，你不能离开。 We discussed the problem until he came back. 我们一直讨论到他回来。知识要点【链接训练】 _________ she met with the difficulty did she realize the importance of our help. A.Only before B.Ever since C.Never until D.Even though 【解析】四个选项中只有only before和never until能用倒装句，而only before和句子意思不相符。句意为：直到她遭遇了困难，才意识到我们的帮助的重要性。故答案为C。【答案】C 知识要点要点四