Transform the sentence "Mrs. Adis sat in the old basket armchair by the fire" into the past perfect continuous tense.

A.5 Language Study.

1. i) To transform the sentence "Mrs. Adis sat in the old basket armchair by the fire" into the perfect continuous tense (specifically, past perfect continuous, as the original verb "sat" is in the past tense):

The structure for the past perfect continuous tense is: subject + had been + present participle (verb-ing).

Original sentence: Mrs. Adis sat in the old basket armchair by the fire.
Verb: sat

Transformed verb: had been sitting

The transformed sentence is:
Mrs. Adis had been sitting in the old basket armchair by the fire.