| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had been [verb] on a | 108 |
|
| 2 | had been [vb pp] on a | 91 |
|
| 3 | had been built [prep] a | 19 |
|
| 4 | had been built on [art] | 16 |
|
| 5 | have been built on a | 11 |
|
| 6 | [verb] been built on a | 11 |
|
| 7 | had [been] built on a | 5 |
|
| 8 | had be built on a | 5 |
|
| 9 | had been build on a | 5 |
|
| 10 | [vb past] been built on a | 5 |
|
| 11 | had [be] built on a | 5 |
|
