1. It was only when I left home that I realised how much my father meant to me
.

2. My father find maps hard to follow
.

3. Customs officals are stopping more travellers than usual this week
.

5. He speaks more persuasively than his brother
.

7.Their teacher is making them study hard
.

8. We left quietly, so that we wouldn't disturb the children
So as not to disturb the children, we left quietly
9. This will be the orchestra's first performance outside London
This will be the first time the orchestra has performed outside London
10. The chances are that the whole thing'll have been forgotten by next term

In all probability the whole thing will have been forgotten by next term. 

Sentence transformation

1.there was no precedent for the King's resignation

never.................before was there precedent for the king's resignation.............................

2.the only way to eliminate world terrorism is by united opposition

only by..........united opposition is the world terrorism eliminated ................................

3.i didn't realize he was your brother until i saw the photograph

it was only...when I saw the photograph that I realize he was your brother.....................................

4.i write to him almost every day

hardly................. does a day pass without my writing to him...........................

5.John didn't celebrate until he received the offer of promotion in writing

not until..........................................

6.it was only when i left home that i realized how much my father meant to me

only when.......... I left home did I realize how much my father meant to me..............................

7.Alice and charles did not decide to move to a bigger house until after the birth of their second child

only when........the birth of their second child did .Alice and charles decide to move to a bigger house ...............................

8.we could relax until all the guests had gone home

only.......when all the guests had gone home that we could relax ..........................................

9.it isn't worth considering his suggestion for a moment

not for a moment........is his suggestion worth giving consideration............................

10.just as she put the phone down, it rang again

scarcely......... had she put the telephone down when her boss rang back........................................

Not until I looked the room did I realize I hadn't turned off the cooker.

My father was the police (inspect)___inspector__and my mother was a primary school(teach)_teacher __. They had both grown up in the city and lived there their entire lives. Their(decide)__decision __to move to a small town when I was a child changed my life. It was a very(peace)__peaceful __place and of course, living there meant that I had much more(free)_freedom__to go wherever I pleased. The people all knew each other and were(friend)_friendly ___but I missed my close friends, my school, and the (noise)_noisy __city I had lived in. As I grew up, I realised that there wasn't much for a young person to do there, expect rush into(marry)___marriage __. When I left, my parents were sad, but they realised that staying there would only make me(misery)__miserable __. The big city I live in now is not very far away, so I can visit my parents(frequent)__frequently  _and have the best of both worlds.

I only recognized him when he came into the room

=> It was not until he came into the room that I recognized him

Not until …. : Mãi đến khi, cho đến khi

Not until S + auxiliary verb……auxiliary verb + S

1. It was not until that morning that she recovered her confidence

2. It was not until half past time that he arrived at the office

3. It was not until 2004 that Mary worked for the UN

4. It was not until I was 15 that I knew how to ride a bicycle

5. It was not until last Saturday that John finished reading my book

1, Paula didn't decided to get married until she was 29

2, i didn't woked up until the sun had risen

3, Simon didn't realized his mistake until i had showed

4. the ice on the lake didn't thawed until the sprinh came

5, the firemen didn't arrived until the building was almost burned down

7. I didn't realize he was your brother until I saw the photograph.

- It was only when I saw the photograph that I realized he was your brother.

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

- It was not when the noise next door stopped that it was after midnight.

9. I only heard her husband's side of the story when I met him in London.

- It was only when I heard her husband's side of the story that I met him in London.

1. It was not until Mark helped me that I finished my project

2. It was not until the electricity was cut off that they paid the bill

3. It was not until midnight that I slept

4. It was not until I had all the information that I could comment further

5. It was not until the war ended that he returned to his native village