Had Israel and Lebanon reached a comprehensive peace agreement in the 1990s, the ongoing disputes over border issues might have been avoided.

• The required answer is - No improvement .
• Complete sentence: Had Israel and Lebanon reached a comprehensive peace agreement in the 1990s, the ongoing disputes over border issues might have been avoided.
- বাক্যটি Third conditional এর উদাহরণ।

• 3rd Conditional এর নিয়মানুযায়ী,
- If clause- এ যদি (had + V₃) হয়, তবে পরবর্তী clause a would/could/might/must + have + V₃ + extension ব্যবহৃত হয়।
- Conditional sentence এ Had + Sub + V₃ + Extension এভাবে কোন sentence শুরু হলে সেটি Perfect conditional / 3rd conditional হয়।

• এছাড়াও, 3rd Conditional = If + Past Perfect (had +V₃) + Perfect Modal (S + would have/could have/might have + V₃).