Question

Write tense structure (Past perfect continuous)...​

Answer 1

Answer:

The past perfect continuous tense (also known as the past perfect progressive tense) shows that an action that started in the past continued up until another time in the past. The past perfect continuous tense is constructed using had been + the verb's present participle (root + -ing).

Explanation:

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Answer 2

Answer:

I had been doing this work for 2 hours.

Explanation:

Subject+had+been + v+ing + object .