| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | if [pron] [vb past] [vb pp] it | 182 |
|
| 2 | [pron] [vb past] [vb pp] it [modal v] | 80 |
|
| 3 | if [pron] [vb past] it [modal v] | 51 |
|
