Unless you study well, you will not prevail. (Make it Compound Sentence)

Complex Sentence: Unless you study well, you will not prevail.
Compound Sentence: Study well or you will not prevail.

• Unless (complex) ↔ or (compound)
- Unless you study well, you will not succeed. এটি একটি Complex Sentence.
- Complex sentence এর শুরুতে "Unless” ও এর পরে second person (you) থাকলে, Compound sentence- এ রূপান্তর করার নিয়ম:
- Unless ও you উঠে যাবে + দুই clause এর মাঝে "or" বসে।

Source: Advanced Learner's by Chowdhury & Hossain.