Fill in the blank with right form of verb: Had I possessed vast property, I ________ a college.

• Third conditional এর নিয়মানুযায়ী - 
Conditional sentence- এ Had + Sub + V₃ + Ext. এভাবে কোন Sentence শুরু হলে সেটিও Perfect conditional/ 3rd conditional হয়।
তাই পরবর্তী clause এ - would/could/might + have + V₃ + extension ব্যবহৃত হয়।
Example:
Had I been a king, I would have helped the poor.
Had I possessed vast property, I would have established a college.

Source: Advanced Learner's English Grammar & Composition by Chowdhury & Hossain.