1 Answers

Option 3 : 3

The correct answer is '3' i.e. error lies in the third part of the sentence.

In the third part of the sentence, the usage of 'improving' is incorrect Instead, use 'improve'

  • According to grammar, whenever we use the helping verb do/does/did we always use the first form of the verb as the main verb.
  • Let's see an example-
    • I did not know Jamie had a knife.

So the correct sentence is- Although he studied regularly, his marks didn't improve.

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