not know the first thing about something
не иметь основных знаний о чём-либо
Пример использования идиомы not know the first thing about something:
Jack wants to buy a car, but I am sure he does not know the first thing about cars.
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Другие идиомы:
- know a trick or two
- know (something) only too well
- know which is which
- know (something) by heart
- know the score
- know better (than to do something)
- know (something) backwards and forwards
- know one's place
- know the ropes
- not know if one is coming or going
- know (someone or something) like the back of one's hand
- know a thing or two (about someone or something)
- know when one is not wanted
- know which side one's bread is buttered on
- know-it-all