Work & careers
know your stuff
know a subject well
To have a lot of knowledge or experience in a particular subject.
Hear it in real life
Can Maya help us choose a good laptop?
Definitely - she knows her stuff.
Our IT technician really knows his stuff, so the problem was fixed in minutes.
The mistake everyone makes
Not: She knows her stuffs about computers.
Say: She knows her stuff about computers.
In this expression, “stuff” is uncountable, even when it refers to knowledge in a subject.
Build it
How it fits in a sentence.
really know your stuff; knows his stuff
Your turn: say it out loud
Our IT technician really knows his stuff, so the problem was fixed in minutes.
Say it out loud two or three times, until it feels like yours.
know your stuff
know a subject well
“Our IT technician really knows his stuff, so the problem was fixed in minutes.”
heytardy
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