请举例说明关系词that在定语从句中充当表语.

问题描述:

请举例说明关系词that在定语从句中充当表语.

My hometown is no longer the place that it used to be .
在这句中,that 作为从句的表语,
从句:it 是主语,后面是系动词,缺少表语,就由that 来充当.