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 |