| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | areas have [be] [vb pp] by | 11 |
|
| 2 | areas have been [verb] by | 11 |
|
| 3 | areas have be [verb] by | 11 |
|
| 4 | areas have [been] [verb] by | 11 |
|
| 5 | areas have [be] [verb] by | 7 |
|
