| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not [been] seen [prep] | 10 |
|
| 2 | have not been seen [prep] | 10 |
|
| 3 | have not be seen [prep] | 10 |
|
| 4 | have not [be] seen in | 5 |
|
