USE ' IT WAS NOT UNTIL..'
1. we didn't eat anything until he got home
->
2. john didn't celebrate until he received the offer of promotion in writing
->
3. i didn't solve the problem until the teacher helped
->
4. he didn't go to the concert until he was 20
->
5. the football match didn't start until 3 yesterday afternoon
->
1. we didn't eat anything until he got home
-> it was not until he got home that we ate something
2. john didn't celebrate until he received the offer of promotion in writing
-> it was not until john received the offer of promotion in writing that he celebrated
3. i didn't solve the problem until the teacher helped
-> it was not until the teacher helped that i solved the problem
4. he didn't go to the concert until he was 20
-> it was not until he was 20 that he went to the concert
5. the football match didn't start until 3 yesterday afternoon
-> it was not until 3 yesterday afternoon that the football match started