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as 引导非限定性定语从句
①as,which引导非限定性定语从句,as重点突出整个句子的含义 ，而which有可能指代主句当中某个词的含义，也有可能指代整个句子的含义。
②as 引导非限定性定语从句，翻译“正如”可以用于主句之前，
as和主句之间要有一个逗号分隔开来。
As we expected, John was admitted to the university.
③as 引导非限定性定语从句，也可以用在主句之后，这时就相当于which
She married him, which was unexpected.
She married him as was unexpected.
④如果在as引导的非限定性定语从句中，运用的是被动语态结构，被动词可以省略。
She married him as unexpected. （was省略）
The material is elastic as shown in the picture. (is省略)
draw up (使车、马等)停住; 逼近，追上(to, with); 草拟
pull up (使车、马等)停住;逼近, 追上(to, with); 拔起
The driver pulled up / drew up at the gate of the school.
司机在学校大门口停下了车。
The car pulled up / drew up at the gate and three men got out.
车在门口停了下来，三个男人走了下来。
Their car now began to pull up / draw up (to the leading one).
他们的车现在开始逼近领头的那辆。
