For many days : কতদিন;
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Appropriate Prepositions
Adapt to(খাপ খাওয়ানো): Everybody must adopt himself to new environment.
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Concerned with(জড়িত): She was concerned with such things.
Look into (তদন্ত করা/অনুসন্ধান করা): I am looking into the matter.
Quarrel with (ঝগড়া করা): Some girls quarreled with one another.
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Idioms
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Right and left (এলোপাথাড়ি - indiscriminately): He planted trees right and left.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.