I suddenly remembered that I had an appointment.

我突然想起我有个约会。

youdao

I suddenly remembered that I didn't bring my key.

我突然想起我没有带钥匙。

youdao

I suddenly remembered that he has not paid the income tax for two months.

我突然想起他已经两个月没交所得税了。

youdao

That's not how I remembered it, but I suddenly realized that I was buying not just sugary treats, but emergency provisions.

WSJ: Merrill Markoe on a Dark and Lonely Road Trip | Traveler's Tale