| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [adv] [verb] | 21206 |
|
| 2 | [pron] [modal v] [adv] happen | 345 |
|
| 3 | [pron] [vb mod] [adv] happen | 345 |
|
| 4 | [pron] could [adv] happen | 40 |
|
