| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but if it [was/were] [verb] | 10 |
|
| 2 | but if it [was/were] [vb pp] | 6 |
|
| 3 | but if it were [verb] | 5 |
|
| 4 | but if it was [verb] | 5 |
|
