once in a blue moon

Значение

very rarely

Очень редко.

Примеры

1. 1We only eat out once in a blue moon, so tonight feels special.
2. 2My brother lives in Canada, so I see him once in a blue moon.
3. 3Priya is always on time; she's late once in a blue moon, and only when the trains are cancelled.
4. 4Does Grandad still go to the cinema, or only once in a blue moon these days?
5. 5The big supermarket is miles from the village, so the family drives there once in a blue moon.

Грамматика

Фраза не меняется. Обычно стоит в конце предложения.