新概念英语第三册 Lesson 08(课文2)

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2，At 2473 meters, it is the highest mountain pass in Europe.
at 2,473 meters:介词短语修饰全句用于句首表示原因、条件或状态
e.g. At the age of 15, he is able. 在十五岁的时候，他就很能干了。
e.g. At one point 65 meters, he is a little short. 他有点矮，只有一米六五。
3, The famous monastery of St Bernard, which was founded in the eleventh century, lies about a mile away.
found v. 建立, 创立 =set up v. 建立，竖立=establish v. 建立，设立
本句是非限制性定语从句。（详见难点）
限制性定语从句和非限制性定语从句最大的区别：
（1）非限制性定语从句是对主句或主句中所出现的某个名词的补充说明和解释，去掉对主句影响不大；
（2）限制性定语从句是主句当中不可缺少的一部分
4, Now that a tunnel has been built through the mountains, the Pass is less dangerous, but each year, the dogs are still sent out into the snow whenever a traveller is in difficulty.
Now that：既然
(1) 当now that用做时间连接词时，后面通常跟完成式
e.g. Now that you have left university, you have to find a job.
(2) 当now that用做原因连接词时，后面时态不限。
e.g. Now that you won't help me, I must do the job myself.
e.g. Now that you are grown-up, you must stop the children's behavior.
whenever 无论何时（详见难点）