4. We didn't go to bed until midnight - Not until... 5. The boy didn't stop singing until their teacher came. - Not until. 6. She didn't write to him until she received a letter from him. - Not until. 7. The letter wasn't written until yesterday. - Not until.. 8. We didn't have a holiday until last summer. Not until.. 9. We couldn't finish it until the end of last summer. Not until.. 10. The child didn't go to sleep until her mother came home. - Not until... Giúp em not until đi ạ

4, Not until midnight did we go to bed.

5, Not until their teacher came did the boy stop singing.

6, Not until she received a letter from him did she write to him.

7, Not until yesterday was the letter written.

8, Not until last summer did we have a holiday.

9, Not until the end of last summer could she finish.

10, Not until her mother came home did the child go to sleep.

4. Not until midnight did we go to bed.

5. Not until their teacher came did the boy stop singing.

6. Not until she received a letter from him did she write to him.

7. Not until yesterday was the letter written.

8. Not until last summer did we have a holiday.

9. Not until the end of last summer could we finish it.

10. Not until her mother came home did the child go to sleep.