It is/ was not until” Examples It wasn't until 10 o'clock that he came back to his dorm. (At 10 oclock he finally came back. t wasnt until 10 years later that they found their lost son (10 years later they finally found their lost son. More to learnExamples • It wasn’t until 10 o’clock that he came back to his dorm. (At 10 o’clock he finally came back.) • It wasn’t until 10 years later that they found their lost son. (10 years later they finally found their lost son.) More to learn It is / was not... until