When I asked him what it was about, he said he couldn』t even remember.

我就问他那通电话是关于什么事情的，他说他什么都想不起来了。

youdao

So remember last time I put up the article by the Crimson that was unfortunately I couldn't find ? a more recent one-- that was 2004?

记得上次,我提出的《哈佛克里姆森》杂志里的文章,很可惜我找不到,更近期一点的，那是2004年的？

哈佛公开课 - 幸福课课程节选

"They had difficult memories, they couldn't be refreshed....They just couldn't remember anything, " Bennett said.

CNN: Senate Panel Releases Whitewater Reports

Remember, you may be a supply clerk, the kind who couldn't remember whether you ordered pens with blue ink or black ink -- but you can be a god for ten minutes when you make your own soda.

ENGADGET: Switched On: The rules of Soda Club (Part 1)

During my kidnapping, I lost my entire identity and couldn't remember my real name.

CNN: To Amanda, Gina and Michelle, from a survivor