1. If Nam had not worked hard, he would have bought that car ( đk loại 3 )
2. So as not to disturb the children, he left quietly. ( So as (not) to V = để (không) làm j đó )
3. It was not until he was 30 that he knew how to swim.
4. A new car was bought by Mary
5. It was not until midnight that she came home. ( It was not until...that S + V2/ed )
6. If we were not busy, we would have gone to the concert.
7. The bridge was designed by a French architect.
10. Several new schools are being built in our town.
#morika