At large ( স্বাধীন ) The anti-socials are still at large.
A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
At all ( আদৌ ) He does not know French at all.
All on a sudden ( হঠাৎ ) All on a sudden a tiger came out of the bush.
Take one to task ( তিরস্কার করা ) He was taken to task for negligence of duty.