Question

Choose the correct sentence:

• A. He had been write a letter.
• B. He has been writing a letter.
• C. He had been writing a letter.
• D. He was been writing a letter

Answer 1

Answer:

C. He had been writing a letter.

• Past Perfect Continuous Tense uses the structure:
  Subject + had + been + verb-ing
  Only option C follows this rule correctly.