Oh, I'm so sorry I forgot to bring along the book you borrowed from the library.

哦，对不起，我忘了把你从图书馆借的书带来。

youdao

Sorry, I forgot to lock the door.

对不起，我忘记锁门了。

youdao

I'm sorry, I forgot.

对不起，我忘了。

《牛津词典》

So this is just, sorry, 1 I forgot about the one here.

等于，对不起，我忘写了一个。

麻省理工公开课 - 热力学与动力学课程节选

Sorry, I forgot.

对不起，我之前忘了。

麻省理工公开课 - 媒体、教育、市场课程节选

And the second assumption is that you can essentially - sorry, I forgot my second point, but the idea that you can just sort of do something over and start afresh given the fact that tens of thousands of people have already been killed.

NPR: A Military Wife on Bush Plan for Troop Increase

Sorry, translator, I forgot you were there. (Laughter.) I got on a roll.

WHITEHOUSE: President Obama��s Bilateral Meeting with President Medvedev of Russia | The White House