神志恍惚

let one's mind wander

精神恍惚

be absent-minded

我恍惚看见。

I can just make it out.

我恍惚记得你说过。

I vaguely remember you saying before.

我恍惚听见门响。

I faintly heard the sound of the door.

我恍惚听见他回来了。

I faintly heard him coming back.