The Past Perfect Continuous (Progressive) Tense
The Past Perfect Continuous Tense is used to express an action that started in the past and continued up until another point in the past. It emphasizes the duration of the action rather than its completion. Structure: Subject + had + been + Verb(ing) + Object Example: * "You had been studying for two hours when your friend called." Key Points: * Duration: It highlights the length of time an action was ongoing. * Completion: The action is understood to have finished before another past event. * Time Expressions: It's often used with time expressions like "for," "since," "before," "until," etc. Example Sentences: * "I had been working on the project for months before I submitted it." * "We had been living in that house since 2010." * "He had been waiting for the bus for two hour when it finally arrived." * "He had been playing the guitar for years before he joined the band." Common Mista...