记不起

• unremember
• have no recollection of

例句

1. 他怎么也记不起碰到过这样一个人。
   He never remembered having come across a man like that.
2. 正是她所说的内容我记不起来了。
   It was what she had said that I failed to recall.
3. 我记不起他的名字－－忘得干干净净了。
   I don't remember his name-- it's gone clean out of my mind.