You say that'll be the day when you think that something is very unlikely to happen.
a) Perhaps Mum and Dad will let us have a party in the house while they're away! That'll be the day!
b) Do you think your elder brother will lend us his car to go to the city? That'll be the day!
Referência: Everyday Idioms. Learners Publishing, 2004.
a) Perhaps Mum and Dad will let us have a party in the house while they're away! That'll be the day!
b) Do you think your elder brother will lend us his car to go to the city? That'll be the day!
Referência: Everyday Idioms. Learners Publishing, 2004.
