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为什么有时候可以省略介词?

来源:学生作业帮 编辑:拍题作业网作业帮 分类:英语作业 时间:2024/04/26 07:35:47
为什么有时候可以省略介词?
有这样一句话:A 12-year-old black boy,I attended a school there that was otherwise all white.之前A 12-year-old black boy是不是省略了介词as。但是如果改成:As a 12-year-old black boy,I attended a school there that was otherwise all white.又会感觉在逻辑上有问题,这个as用得不恰当。可以说一下原句的用法吗?
a 12-year-old boy 是做状语,即being a 12-year-old boy,等于when I was 12 years old.