Commencement

Today, I finally graduated from the doctoral program of my university.

My university life, 9 years were really long.

During this time, I had gotten various help and support from many people, especially from my parents.

I can't thank them enough.

From now on, I will work hard to return the courtesy and make a social contribution.

Tonight, I enjoyed the last banquet as a student.

卒業式

今日、私はついに、大学の博士課程を卒業しました。

9年という大学生活は、とても長かったです。

そしてこの間、大変多くの方からさまざまな形でご支援・ご助力を頂いて参りました。

感謝してもしきれません。

今後は社会貢献、そして恩返しをすべく、日々邁進していく思いです。

今夜は、学生最後の宴会を楽しみました。

• Commencement
• This sentence is perfect! No correction needed!

• Today, I finally graduated from the doctoral program of my university.
• This sentence is perfect! No correction needed!

• My university life, 9 years were really long.
• My university life was 9 years - a really long time.

• During this time, I had gotten various help and support from many people, especially from my parents.
• During this time, I got help and support various help and support from many people, especially from my parents.

  Because all of this is in the past and completed, the past simple is better than the present perfect.

• I can't thank them enough.
• This sentence is perfect! No correction needed!

• From now on, I will work hard to return the courtesy and make a social contribution.
• From now on, I will work hard to return the favor and make a social contribution.

  You weren't wrong before, but "return the favor" is more common than "return the courtesy".

• Tonight, I enjoyed the last banquet as a student.
• This sentence is perfect! No correction needed!

Red corrections are necessary changes, and blue corrections are suggestions to help the text sound more natural and native.

I hope that helps!

• Today, I finally graduated from the doctoral program of my university.
• Today, I finally graduated univefrsity of (name of your university) for the doctoral program of my university.

• My university life, 9 years were really long.
• This sentence is perfect! No correction needed!

• During this time, I had gotten various help and support from many people, especially from my parents.
• During this time, I had gotten various help and supports from many people, especially from my parents.

• I can't thank them enough.
• I can't thank them enough (what they've done for me).

• Tonight, I enjoyed the last banquet as a student.
• Tonight, I have been enjoyinged the last banquet as if a student .