Answer:
he 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:
plz plz plz mark me as brilliant
He knew very little about gis father at first
There were actually two American writers. The two American writers were Mark Twain and William Dean Howells.
