Tenses Questions
The present perfect continuous tense is used to describe an action that started in the past and is still ongoing in the present. It emphasizes the duration or repetition of the action. Example: "I have been studying for three hours."
On the other hand, the past perfect tense is used to describe an action that happened before another action in the past. It emphasizes the sequence of events. Example: "I had already studied when my friend called."
In summary, the present perfect continuous focuses on the ongoing action in the present, while the past perfect focuses on the completed action in the past.