Easy come easy go : অনায়াসে পাওয়া জিনিস সহজেই খরচ হয়ে যায়;
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Appropriate Prepositions
Concern with (জড়িত থাকা): Asif is not concerned with this conspiracy.
Covetous of(লোভী হওয়া): He is covetous of wealth.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Regret for (দুঃখ করা): We regretted for his failure.
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Idioms
At one’s elbow (near at hand — হাতের কাছে – adv.) His private secretary is always at his elbow.
Dead language (যে ভাষা এখন আর কথ্য নয়): Sanskrit is a rich language, but it is now a dead language.
Fight shy of (এড়িয়ে যাওয়া): Honest boys always fight shy of bad and dishonest friends.
In one’s teens (তের থেকে উনিশ বছর বয়সের মাঝে): She is yet in her teens.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.