Not know the first thing about Meaning in English
expression
释义
To have absolutely no knowledge or understanding of a subject or topic.
用法与细微差别
Informal and often used to emphasize total ignorance in a slightly humorous or critical way. Commonly followed by a topic ('not know the first thing about computers'). Can be softened or made stronger ('not know the slightest thing about'). Do not use literally; it means zero understanding, not just being a beginner.
例句
I do not know the first thing about cars.
basic
She doesn't know the first thing about cooking.
basic
They didn't know the first thing about computers when they started.
basic
Honestly, I don't know the first thing about fixing bikes, so don't ask me!
natural
My dad doesn't know the first thing about social media, but he's trying to learn.
natural
You can tell he doesn't know the first thing about fashion by his clothes.
natural