英语语法：非谓语动词-请从语法角度分析这两句话为什么能这样合并.Although theseplastic bottles have been used already,they can be recycled.合并为：Used already,theseplastic bottles can be recycled.
问题描述：
英语语法：非谓语动词-请从语法角度分析这两句话为什么能这样合并.
Although these
plastic bottles have been used already,they can be recycled.
合并为：Used already,these
plastic bottles can be recycled.
答
逻辑主语一致，再省略一些部分就可以了，
答
Although these plastic bottles have been used already, they can be recycled.
这是一句让步状语从句,尽管这些塑料瓶已经用过了,但是它们是可以回收的.
将状语的从句部分,改为非谓语动词形式,
主句的主语是plastic bottles (塑料瓶),那么从句部分的动词 use与plastic bottles 的关系是被动关系,所以就采用过去分词used的形式.
Used already, plastic bottles can be recycled.
答
原句有连词although,并且连词后面有主谓,因此是状语从句改为非谓语的思路：Used already,的逻辑主语是plastic bottles,塑料瓶和使用之间是被动关系,因此用过去分词,used,主句不变因此,非谓语句子是：Used already,th...