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
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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
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.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
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 )