| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [conj] it [modal v] [verb] | 359 |
|
| 2 | [vb pp] [conj] [pron] could [verb] | 306 |
|
| 3 | [verb] [conj] it could [verb] | 130 |
|
