| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have n't been [prep] | 439 |
|
| 2 | have been seen [prep] | 297 |
|
| 3 | have n't seen [prep] | 42 |
|
| 4 | have n't been seen | 26 |
|
| 5 | n't been seen [prep] | 8 |
|
