know one's ABCs
знать основное о чём-либо, иметь базовые знания
The woman in the library knew her ABC's and could quickly give me the information I needed.
Другие идиомы:
- know-how
- know (something) only too well
- know (someone or something) like the back of one's hand
- know one's stuff
- not know if one is coming or going
- know (something) from memory
- know where all the bodies are buried
- know what's what
- know (something) in one's bones
- know (something) backwards and forwards
- know (something) inside out
- not know the first thing about something
- know-it-all
- know one's place
- know one's own mind