| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] if it [verb] not been | 16 |
|
| 2 | [adv] if it have not been | 16 |
|
| 3 | [adv] if it [verb] not been | 16 |
|
| 4 | [adv] if it had not been | 13 |
|
| 5 | [adv] if it [vb past] not been | 13 |
|
| 6 | [adv] if it [verb] not been | 12 |
|
