| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [vb mod] [be] [verb] | 597 |
|
| 2 | [verb] it [vb mod] [be] [verb] | 572 |
|
| 3 | [vb past] it [modal v] [be] [verb] | 120 |
|
