| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [being] built | 52 |
|
| 2 | [was/were] being built | 52 |
|
| 3 | [was/were] be built | 52 |
|
| 4 | was [be] built | 31 |
|
| 5 | were [be] built | 21 |
|
