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be on duty

Idiom Responsibility

Meaning

to be working or responsible for something at a certain time

Example Sentences

"The guard was on duty all night."

Related Expressions

to screw up

to make a serious mistake or spoil something

a fish out of water

feeling uncomfortable in an unfamiliar situation

take someone's word for it

to trust that what someone says is true

lock someone up

to imprison or jail someone

the acid test

a true and final test of success

once in a while

sometimes, but not very often