Question

past perfect continuous tense of the surgeon was performing complicated eye operation

Answer 1

Answer:

the surgeon had been performing a complicated eye operation (past perfect continuous)

Answer 2

Answer:

past countinues tense

Explanation:

because the work is already done but he is doing it more, showing that the work was done in past but is countinued now

that is why it is past countinues tense

hope it helpedω

please follow :}