Multiple choice softskills communication

I tried my best but I __________ do the exercise.

  1. can't to

  2. couldn't

  3. am not able

  4. shouldn't
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When talking about inability in the past, we use 'couldn't' (could not). 'Can't to' is grammatically incorrect - 'can't' is never followed by 'to'. 'Am not able' would need 'to' after it ('am not able to'), making it incomplete here.

Keep practicing — related questions