Nuts and bolts : ব্যবহারিক খুঁটিনাটি;
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Appropriate Prepositions
Abide with(সঙ্গে থাকা): If you would like to rest for a while, you can abide with me.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
Consist in (কোনো কিছু মধ্য বিদ্যমান থাকা): Happiness consists in contentment.
Loyal to (অনুগত): Every citizen must be loyal to the state.
Rejoice at/in (আনন্দ করা): Everybody rejoiced at/in his success.
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Idioms
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
Maiden speech (প্রথম বক্তৃতা): His maiden speech fell flat on the audience.
Now and then (মাঝে মাঝে): He comes here now and then.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.