It the first time I have got up earlier than my parents.这里的从

回答：根据英语的习惯表达法,表示“某人第...次做某事”有两种句型,意思相同,但时态不同.
1.It’ /This is the first/second/ third… time for sb. to do sth
2.It/ This is the first/second/ third… time sb has done sth.
提问中的句子用的是第二种句型,所以用了现在完成时.
又如：
这是我第一次参观紫禁城.
This is the first time for me to visit the Forbidden City
This is the first time I have visited the Forbidden City.
欢迎提问,乐意解答；愿你满意, 望你采纳.

就是一个句型

句子开始是It the first time ／It the second time ／It the last time 等类似结构时，后跟完成时，表示至今为止是第一次