I have a feeling both tenses are relevant here, but need some guidance if possible.

“He knew how to use the machine because he has/had used it before.”

Please correct me if I am wrong, we should be using had over has,

because there is a connection between two activities that happened in the past, where the first causes the other to happen.

Thanks in advance

  • What do you mean by "rule fishing"?
    – James K
    Sep 28, 2020 at 3:24
  • should have titled it as Grammar fishing.
    – Pubwie
    Sep 28, 2020 at 4:55

1 Answer 1


You're quite right.

He knew... because he had used it before.

After He knows... you would need ...because he has used it before.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .