Question

A.4. Change into Past continuous tense:
i) The Trojans had built a strong wall around the city.
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Answer 1

Answer:

The Trojans were building a strong wall around the city

Explanation:

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Answer 2

Answer:

The Trojans were building a strong wall around the city.

Formula of past continuous tense

S+was/were+vi+ing+object+other words

singular = was

plural = were