If it stops raining, we'll finish the picnic this afternoon.

After the awkward interview, the HR manager smiled politely and said, 'don't call us, we'll call you,' and I left knowing I had no chance.

After the third failed audition, the casting assistant smiled thinly and said, 'don't ring us, we'll ring you,' before closing the folder.

By the time you arrive, we'll've finished dinner.