Question

he has completed his work. (Negative)​

Answer 1

Answer:

he has not completed his work.

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Answer 2

Answer:

He has not left his work incompleted.

Explanation:

When you have to change a sentence from Affirmative to Negative or from Negative to Affirmative , you cannot change the meaning of the sentence. Without changing the meaning of the sentence you have to do as directed.