to lose track of something or somebody

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I need your help with the idiom " to lose track of smth or smb.".

I have a difficulty with the answer keys to the exercise 9, p.7 from "Cambridge English Objective Proficiency. Workbook. 2nd edition".
It has a task where students must look at the idioms, and the three possible sentences containing them. The task is to put a tick (v) if the sentence is correct and a cross (x) if it's wrong.

Here is the task and the answers given in the keys:
1) Sorry, I've lost track of what we're supposed to be doing. - v correct
2) Sorry, I've lost track of you since we were at school together. - x wrong
3) Sorry, I've lost track of that new coat you gave me. - x wrong

My problem is that I can't understand why the second sentence is wrong.

If we look into dictionaries, we'll read:
1) Oxford learner's dictionaries
keep/lose track of somebody/something = to have/not have information about what is happening or where somebody/something is
2) Longman English Dictionary Online
lose track of something/somebody (=stop knowing where someone or something is)
e.g. He lost track of her after her family moved away.

So what’s wrong with the second sentence in the exercise?

I’m looking forward to your help!!!
Last edited:
  • RM1(SS)

    Senior Member
    English - US (Midwest)
    #2 doesn't work because if you're speaking to the person, you've obviously "regained" track (so to speak). It should be "Sorry, I [had] lost track of you since we were at school together."

    I don't see anything wrong with #3....
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