What years does Harry see the whole sorting ceremony and in the years he doesn't, why not?

The years that he sees the sorting ceremony are: First, fourth, and fifth.

In 秒 年 Ron and Harry fly Mr Weasley's car to school and hit the whomping willow and are forced to eat in McGonagall's office.

In third 年 Harry is late after fainting on the train because of the dementor.

In sixth 年 Malfoy breaks Harry's nose and hides him under his invisibility cloak. ニンファドーラ・トンクス finds him and walks him back to school and he is late again.