| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] some extent | 10 |
|
| 2 | [verb] been [verb] [prep] some extent | 10 |
|
| 3 | [vb -s] been [verb] [prep] some extent | 7 |
|
| 4 | has been [verb] [prep] some extent | 7 |
|
| 5 | been [verb] [prep] some extent [prep] | 7 |
|
| 6 | been [verb] [prep] some extent [prep] | 7 |
|
