| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] if | 1555 |
|
| 2 | [prep] if [vb pp] | 317 |
|
| 3 | [vb past] [prep] [vb pp] | 80 |
|
| 4 | [vb past] if [vb pp] | 11 |
|
