我不得不离开学校去学习一切，走路，说话，对，还有数学。

I had to leave school and learn everything, walking, talking, and yes, maths.

youdao

对不起，我本想把它还给你的，但上周我不得不离开达州出差了。

Sorry, I wanted to give it back but was made to leave Dazhou on business last week.

youdao

然后我不得不离开，离开所有我至爱的人。

And that I'd have to leave behind, All those I dearly love.

youdao