英语语法,被动Over 170 countries now impose drink-driving limits,accordi_英语解答

英语语法,被动
Over 170 countries now impose drink-driving limits,according to a new report by the World Health Organisation,although the amount of alcohol allowed varies considerably
为什么最后一句话不是is allowed to varies considerably?
不是应该是被动的吗?

人气：305 ℃　时间：2020-05-27 08:27:12

解答

如果用is allowed to varies considerably,那由although引导的从句不是有两个谓语（is allowed和varies）了吗?
及物动词的过去分词作表语,与句子主语是被动关系,所以这里句中的allowed已经有被动的意味了
分析句子成分不要顾此失彼喔~~~