I would like to ask about repeating the preposition in this sentence "he focused on learning the poems by heart not (on) how to write poetry."

Is it necessary to use the preposition with the bracket or can we omit it?

Thank you.


Hi Sarooj welcome to English Language Learners SE!! The brackets signify that you may or may not use the preposition. You are free to omit the brackets, but for this sentence, you must use the on.

Although there should be one correction in the sentence

He focused on learning the poems by heart and not on how to write poetry.

  • Welcome! If you think my answer is correct, then please click the green check mark to mark this answer as correct. – Khushraj Rathod Nov 20 '18 at 17:08
  • This answer seems to contradict itself. It says you "may or may not use the preposition" but it also says "you must use the on". Actually, I think the "on" is optional. – ignorantFid Nov 20 '18 at 19:17

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