1. The doctor was not out until 2 p.m.

→ It was not until 2 p.m that the doctor was out.

    Not until 2 p.m was the doctor out

2. I couldn't speak English well until the third year.

→ It was not until the third year that I could speak English well

    Not until the third year could I speak English well

3. The noise next door did not stop until after midnight.

→ It was not until after midnight that the noise next door stopped

    Not until after midnight did the noise next door stop

4. The carpenter did not finish his work until Monday.

→ It was not until Monday that the carpenter finished his work.

    Not until Monday did the carpenter finish his work.

5. The radio broadcast did not begin until 1920.

→ It was not until 1920 that the radio broadcast began

    Not until 1920 did the radio broadcast begin

6. I don't know how to use a computer.

→ It was not until now that I knew how to use a computer.

    Not until now do I know how to use a computer.

7. She couldn't swim until she was ten.

→ It was not until she was ten that she could swim.

    Not until she was ten could she swim.

< Chúc bạn học tốt >

1. it was not until 2p.m that the doctor was out 

-not until 2p.m was the doctor out 

2. it was not until the third year that i could speak english well 

-not until the third year could i speak english well 

3. it was not until after midnight that the noise next door stopped 

-not until after midnight did the noise next door stop 

4. it was not until monday that the carpenetr finished his work 

-not untill monday did the carpenter finish his work 

5. it was not until 1920 that the radio broadcast began 

-not until 1920 did the radio broadcast begin 

6. it was not until now that i knew how to use a computer 

-not until now do i know how to use a computer 

7. it was not until she was ten that she could swim 

-not until she was ten could she swim

        -answer by min-

doneat2:45pm

p/s : vote và chọn ctlhn cho mình nhé ><