the indoor seimming pool seems to be a great deal more luxur

来源：学生作业帮编辑：搜狗做题网作业帮分类：英语作业时间：2024/07/08 02:09:15

the indoor seimming pool seems to be a great deal more luxurious than__
为什么一定要选is necessary不能选it is necessary呢?

空格里可以填is necessary或necessary.
than也可以看作定语从句的连词,即关系代词,在句中作用相当于which,区别在于前面有形容词或副词比较级.因此可以看出,从句中关系代词than作主语,不需要it.
而如果直接填necessary,是比较状语从句的省略用法.习惯上不用it is necessary.

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