this is the first time that i have come here;是定语从句的话,它的先行词什么?

问题描述:

this is the first time that i have come here;是定语从句的话,它的先行词什么?

the first time

time

this is +时间,地点,人物+that
这是.(时间,地点,人物)+后面发生的事

是time。that是连接词,因为有the first,所以用that