I helped her solve the problem. (Passive)
She was helped solve the problem
The problem was solved by me
Her problem was solved by me
She was helped to solve the problem by me
সঠিক উত্তর:
She was helped to solve the problem by me
ব্যাখ্যা ও নোট:
Active voice-এ help, make ইত্যাদির পর verb-এর আগে 'to' উহ্য থাকে (bare infinitive)। Passive করার সময় সেই 'to' বসাতে হয় (to solve)।