For one thing : একটা কারণ হল; একটি কারণে;
Related Words
for nothing  for one thing  fornothing  fronting  See Words Also In
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Appropriate Prepositions
Acquit of (অব্যাহতি দেয়া): The chief justice acquitted him of the charge of murder.
Adjacent to (সন্নিহিত): His house was adjacent to the bridge.
Consent to(মত দেওয়া): The Prime Minister consented to the proposal.
Cope with(সামলানো বা পেরে উঠা): They cannot cope with the situation.
Effect of (প্রভাব): The effect of corruption is very harmful for our society.
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Idioms
Cut a sorry figure (খারাপ ফল করা): He cuts a sorry figure in the examination.
From hand to mouth (দিন আনে দিন খায়): The poor man live from hand to mouth.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.
Show good manner (ভালো আচরণ প্রদর্শন ): You should show good manner in the company of young ladies.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.