| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] often [vb past] if | 5 |
|
| 2 | [pers pn] often [vb past] if | 5 |
|
| 3 | often [vb past] if [pron] | 6 |
|
| 4 | often [vb past] if [pers pn] | 5 |
|
