2018-2019学年高一英语（人教版）必修三专题之句型透析学案：Unit5 Canada—\\"The True North\\"

二、句型剖析

1.the second largest /biggest 第二大 【典型例句】

It’s the second most interesting novel，but not the first best one. 在最有趣的小说中，这本书名列第二，不是第一。 She is the third best student in class. 她在班上名列第三。 The Huanghe River is the second longest river in China. 黄河是中国第二大河。

Canada is the second biggest country in the world. 加拿大是世界上第二大国家。 【知识小结】

“the +序数词+形容词最高级+n.”表示“第几……”的意思。序数词可以修饰形容词的最高级。有时在形容词最高级前不加定冠词the,而是加不定冠词a 或an，表示“很；非常”；没有“最……的”意思。 如：This is a most interesting novel. 这是一本非常有趣的小说。

另外，当序数词前加定冠词时，表示“第几……”，但当序数词前加不定冠词时表示“再……；又……”。如：

He has eaten two apples ,and he wants to have a third one. 他已吃了两个苹果，他还想吃一个。

活学巧用

1.单项填空

（1）Greenland, _________ island in the world， covers over two million square kilometres. A.it is the largest C.is the largest 答案：D

（2）How beautifully she sings! I’ve never heard _________. A.the better voice C.the best voice 答案：D

（3）As we know, Canada is _________ country in the world. A.a second larger C.the second large 答案：B

（4）—Is the flower beautiful?

—Yes, at _________ it’s _________ the one I bought yesterday. A.least; as bad as

B.least; no better than

D.least; no worse than

B.the second largest D.the second larger

B.a good voice D.a better voice

B.that is the largest D.the largest

C.least; not better than 答案：D

2.not … until 直到……才…… 【典型例句】

I shall stay here till /until next Sunday. 我将留在这儿一直到下星期天。 He had been in Beijing till/ until last week. 他在北京一直呆到上星期。 Don’t wake him till/until midnight. 午夜以前不要叫醒他。

He didn’t arrive until the game had begun. 直到比赛开始他才来到。

He didn’t appear till/until the concert had begun. 直到音乐会开始他才露面。 【相关链接】 till/until prep.

（1）（用于肯定句，与延续性动词连用）直到……为止。

（2）（用于否定句，与非延续性动词连用）not …until “直到……才……；在……以前”

till/until conj.从属连词，引导时间状语从句。

（1）主句为肯定句，主句的谓语动词为延续性动词，直到……为止。 （2）用于否定句的主句之后，主句中的谓语动词常用非延续性动词，表“直到……才”。另外，not… until 还可以用于倒装句和强调句。如：

Not until I told him did he know about it. It was not until I told him that he knew about it.

我告诉他，他才知道的。

活学巧用 2.1)单项填空

（1）It was not until _________ that _________ to prepare his lessons. A.did his father come in ;the boy began B.his father came in; the boy began C.did his father come in ;did the boy began D.his father came in; did the boy begin 提示:这是not… until 的强调句式。 答案:D

（2）_________ he met with the difficulty did he realize the importance of our help. A.Even though C.Only before

B.Never until

D.Ever since

提示:本题考查倒装句用法。四个选项中只有never until 和only before 能用倒装句，而only before 和句子的意思不相符。 答案:B 2）汉译英

（1）他们一直工作到天完全暗下来。 ___________________________

答案：They kept on working until it became completely dark.

（2）一直往前，直到你走到一座桥为止。 ___________________________

答案：Go straight on until you come to a bridge . （3）在你告诉我之前，我对此一无所知。 ___________________________

答案：Until you told me， I had no idea of it.