| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | areas have been | 103 |
|
| 2 | areas have been | 59 |
|
| 3 | areas [vb base] been | 59 |
|
| 4 | areas [vb -s] been | 27 |
|
| 5 | areas has been | 27 |
|
| 6 | areas had been | 16 |
|
| 7 | areas [vb past] been | 16 |
|
