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