百度作业网you must consider how dependent on regular rainfall they mus
来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/06/18 00:23:02
you must consider how dependent on regular rainfall they must have been.后面have been中been!
you must consider how dependent on regular rainfall they must have been.句意是一必考虑他们当时如此的依赖常规的降雨!其句中have been “been”后面是省略了内容 还是其他用法?为什么后面不接任何词了呢?
另外More people own houses these days than used to years ago.
The traffic is even worse than it used to be.
为什么同样是主语比较 一个是 used to 一个是used to be
you must consider how dependent on regular rainfall they must have been.句意是一必考虑他们当时如此的依赖常规的降雨!其句中have been “been”后面是省略了内容 还是其他用法?为什么后面不接任何词了呢?
另外More people own houses these days than used to years ago.
The traffic is even worse than it used to be.
为什么同样是主语比较 一个是 used to 一个是used to be
1have been 后没有省略内容,这个句子是个宾语从句,从句的正常语序是 they must have been dependent on regular rainfall.由how引导就把dependent on regular rainfall提前了.
2.use to do sth表示过去常做某事,to 后面跟动词原型（如果是is,am,are之类的be动词,则是use to be）
这句子省略了,你可以这样看More people own houses these days than they used to own years ago.
The traffic is even worse than it used to be.(你看前面用的是is,所以to后面接be )
再问： 一看就是高手 谢谢您 豁然开朗 后两个句是网上找的 感觉非常不符合正式语法 特别是其中的第一个 好像原句中两个事物根本就不能比 因为than后的主语明显不可能还是more people 所以省略根本就是错了。另外即便用those加后置定语限定了那部分人的范围，但是used to后面还是缺少内容啊 因为很明显愿意是主语比较 而主句主语后面的动词是own 所以used to 只是起限定“主语”的作用 所以还是要补全助动词 did的啊 想问您怎么看？
再答： 我觉得这句子没错的啊，to后面怎么可能出现过去式did呢，英语里头有很多这样的省略句啊，避免重复。
2.use to do sth表示过去常做某事,to 后面跟动词原型（如果是is,am,are之类的be动词,则是use to be）
这句子省略了,你可以这样看More people own houses these days than they used to own years ago.
The traffic is even worse than it used to be.(你看前面用的是is,所以to后面接be )
再问： 一看就是高手 谢谢您 豁然开朗 后两个句是网上找的 感觉非常不符合正式语法 特别是其中的第一个 好像原句中两个事物根本就不能比 因为than后的主语明显不可能还是more people 所以省略根本就是错了。另外即便用those加后置定语限定了那部分人的范围，但是used to后面还是缺少内容啊 因为很明显愿意是主语比较 而主句主语后面的动词是own 所以used to 只是起限定“主语”的作用 所以还是要补全助动词 did的啊 想问您怎么看？
再答： 我觉得这句子没错的啊，to后面怎么可能出现过去式did呢，英语里头有很多这样的省略句啊，避免重复。
you must consider how dependent on regular rainfall they mus
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