At one time : একদা; এককালে; একবার;
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Appropriate Prepositions
Annoyed at(ব্যক্তি ছাড়া অন্যকিছুর প্রতি বিরক্ত): They were annoyed at his rough behavior.
Aware of(অবগত): I am not aware of his dishonesty.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Plead for (ওকালতি করা): He pleads for justice.
Stick to (দৃঢ়ভাবে লেগে থাকা): We should always stick to our decisions.
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Idioms
Backstairs influence (secret and illegal influence- গোপন এবং বে আইনী প্রভাব-n) He did not deseve the job, however, he got it by backstairs influence.
For good (চিরদিনের জন্য): He left the house for good.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.