Rishan walks as if he ____ lame.

Correct sentence: Rishan walks as if he were lame.

• as if/as though এর আগে present indefinite থাকলে পরে past indefinite হয়।
• be verb থাকলে সবসময় were হয়।
• আগে past indefinite থাকলে পরে past perfect হয়। Example: He spoke as though he had been mad.