If there is someone doing better than we are.为什么用doing

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If there is someone doing better than we are.为什么用doing

If there is someone doing better than we are.为什么用doing
If there is someone doing better than we are.为什么用doing

If there is someone doing better than we are.为什么用doing
doing 是现在分词,作定语,修饰someone;someone doing 意义上(即逻辑上)是主谓关系,所以用现在分词.举例:There are twenty students playing football on the playground.(=There are twenty students who are playing football on the playground.相当于定语从句.)

there be句型,是固定搭配必须动词ing否则造成双谓语

其实很简单, doing之前的动词是“is”, 所以 is + 动词ing形式。 不用每次都分析句子成分和所在位置是做什么修饰和修饰谁的。