Identify the correct form of past perfect continuous tense: She ______ (play) for two hours.

1. She had been playing for two hours.
2. She had playing for two hours.
3. She had played for two hours.
4. None of these

a. She had been playing for two hours. (Correct Answer)

• This is the correct form of the past perfect continuous tense. It follows the structure:
  • Subject + had + been + verb-ing (present participle)
• It indicates an action that started in the past, continued for a period of time, and was completed in the past.