it was not until midnight that the party came to an end 2. it was not until he got part of his stomach removed that he stopped drinking 3. it was not until his teacher talked to him that we could make him change his mind 4. it was not until Tom could solve the maths problem that he went to bed 5. it was not until Mr Martin was too weak to work that he retired +) it was not until... that... : đến tận khi.... thì....