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问题: 英语

As is described in the picture,I think,the driver must be doing over one hundred and sixty miles at moment.为什么前面要加is?

解答:

As 是关系代词 引导定语从句 ,代指后面的句子the driver must be doing over one hundred and sixty miles at moment.

其次 是因为是一个被动,所以用is +pp
正如画中被描述的一样,。。。。。

参考文献: 个人观点