We went to the dining room after the work had been completed. (make it compound)

• After বা before যুক্ত Complex Sentence কে Compound Sentence- এ রূপান্তরের নিয়ম:
- Complex sentence- এ past perfect tense যুক্ত clause টি Compound sentence- এ প্রথমে বসে এবং উক্ত clause টিকে past indefinite form- এ বসাতে হবে।
- after বা before এর পরিবর্তে and then বসে।
- Complex Sentence- এর past indefinite tense টির অংশটি বসবে।

• After:
Complex Sentence: We went to the dining room after the work had been completed.
Compound Sentence: The work was completed and then we went to the dining room.

• Before:
Complex Sentence: The train had started before we reached home.
Compound Sentence: The train started and then we reached home.

Source: A Passage to the English Language S. M. Zakir Hussain.