On the spot : অকুস্থলেই; সঙ্গে সঙ্গে; হাতে-হাতে; ততক্ষণাত; সতর্কভাবে; প্রস্তুতভাবে; সঙ্কটাপন্ন;
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Appropriate Prepositions
Adapt for (উপযোগী করে নেওয়া): This book has been adapted for the children.
Congratulate on(অভিনন্দন জানানো): They congratulated me on my brilliant success.
Contribution to (অবদান): His invention made a major contribution to road safety.
Deprived of (বঞ্চিত): He was deprived of education due to extreme poverty.
Indispensable to (অত্যাবশ্যকীয়): Your help is indispensable to him.
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Idioms
After all - (সব কথার পরেও): I rang and told her I couldn't come after all.
At a standstill (নিশ্চল, অচলাবস্থায়-adj.) The discussion is now at a standstill.
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.