English, asked by Gloriosa65, 8 months ago

I did not know doctor Sandhu (do) valuable research in the field of cancer change into past perfect continues tense

Answers

Answered by vishwakarmatanisha1
0

Answer:

I was not knowing before doctor Sandhu dos valuable research in the field of the cancer

Answered by indranisaha076
2

Answer:

answer-I did not know that doctor sandhu"has been doing" research in the field of cancer

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