contraposition In this sentence of principally the past tense (not written by me), 'ago' is gramatically proper rather than 'before'? Yes, Ago - is the correct choice. still doing the same assignments which his father had done over 20 years ago".
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contrapositionIn this sentence of principally the past tense (not written by me), 'ago' is gramatically proper rather than 'before'?Yes, Ago - is the correct choice. Even though not wrong and not written by you, my personal preference would revise it to: "...still doing the same assignments which his father had done over 20 years ago". Just my thoughts