Answer :

The correct sentence is 'Unfortunately, John didn't manage to finish his homework on his own.' This is because 'didn't manage to' correctly conveys that John was unable to complete the task.

Let's explore why the other options are not correct:

  1. Couldn't to - This phrase is grammatically incorrect because 'couldn't' (a modal verb) should be followed by the base form of the verb without 'to'.

  2. Didn't be able to - This phrase is incorrect because 'didn't' should be followed directly by the base form of 'be', making it 'wasn't able to' or 'couldn't'.

The choice 'didn't manage to' correctly combines the past tense auxiliary 'didn't' with 'manage to', which is used to express that someone tried but was unsuccessful in completing a task or activity.

Thanks for taking the time to read Unfortunately John finish his homework on his own 1 didn t manage to 2 couldn t 3 wasn t able to. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada