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

But he told the jury that he couldn't remember precisely what he had said to either of us.

ECONOMIST: A tangled web | The

And he testified that actually he couldn't remember much of what he told his aides.

CNN

Not surprisingly, he said it was a Chenin Blanc from his native Loire Valley, but he couldn't remember the maker or the vintage.

WSJ: Singing of France's Unsung Chenin Blanc | On Wine by Jay McInerney