| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have not been treated | 17 |
|
| 2 | [verb] not been treated | 17 |
|
| 3 | [vb past] not been treated | 12 |
|
| 4 | had not been treated | 12 |
|
| 5 | not been treated [prep] | 5 |
|
| 6 | not been treated [prep] | 5 |
|
