Question

She was doing her homework She had been doing her homework Which is correct?

Answer 1

See below

Explanation:

Need more information to determine, depending on what it is followed by

Past continuous tense emphasizes interrupted actions in the past, while past perfect continuous tense emphasizes a duration of time before something in the past.

For additional info: https://www.englishpage.com/verbpage/pastperfectcontinuous.html