To and fro : ইতস্তত; ওদিক; ইতস্ততঃ; এদিক;
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Appropriate Prepositions
Ask for (কোনো কিছু চাওয়া): Do not ask him for any help because he doesn’t like to help anyone.
Assent to(সম্মতি দেওয়া): The President has assented to the bill.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Dull at (অপ্টু/কাঁচা): He is dull at mathematics.
Play on (বাজানো): They play on the piano.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
Round the clock (সমস্ত দিন): He is working round the clock.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.