Oh, it's nearly slipped my mind.
哦,我差點忘了!
Now where was I?
我說到哪兒了?
Sorry, my mind's gone blank.
對不起,我的記憶一片空白。
I have no recollection of meeting him.
我不記得見過他。
I can't really recall.
我真的想不起來了。
I've completely forgotten.
我徹底忘記了。
I do have a memory like a sieve.
我記性特別不好。
What was I thinking of?
我當時是怎么想的?