Which is grammatically correct?

What is your course back then?


What was your course back then?


You cannot use the Present Simple with "back then". Only "What was your course back then?" is correct.

"Back then" is an expression you can use in order to refer to a specific period of time in the past. So are "at that (the) time" and "in those (the) days". However, you can use "at that (the) time" with the future tenses.

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  • Thanks mates! If the time is in the past, you should use past tense, as well. – Fawkes May 23 '17 at 9:54
  • 3
    Presumably it should be "your", not "you"? ("What was your course back then?") – SteveES May 23 '17 at 9:59
  • 1
    "What was your course back then?" is correct. – SovereignSun May 23 '17 at 9:59

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