Good old : সত্যিসত্যি অথবা ব্যঙ্গ করে কাউকে প্রশংসা করার সময় তার নামের আগে ব্যবহৃত হয়;
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Appropriate Prepositions
Caution against(সাবধান): Take all cautions against the danger.
Control over(নিয়ন্ত্রণ): He has no control over his sons.
Inquire for (দেখা করতে চাওয়া): He inquires for the manager.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Run after (পশ্চাদানুসরণ করা): Do not run after money.
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Idioms
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Pros and cons (খুঁটিনাটি): You should consider the pros and cons of the system.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Well-to-do (সঙ্গতিপূর্ণ) - He was not born in a well-to-do family.