Question

Ravi has completed his school assignment change into past perfect continuous​

Answer 1

Answer:

Ravi had completed his school assignment

is answer

Answer 2

Answer:

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Ravi had been completing his school assignment.

Extra Information:

The past perfect continuous is formed using had + been + present participle. Questions are indicated by inverting the subject and had. Negatives are made with not

☞Statement: You had been waiting there for more than two hours when she finally arrived.

☞Question: Had you been waiting there for more than two hours when she finally arrived?

☞Negative: You had not been waiting there for more than two hours when she finally arrived.