| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pron] could have | 482 |
|
| 2 | [pron] could have [noun] | 107 |
|
| 3 | [adv] [pron] have [noun] | 38 |
|
| 4 | [adv] [pron] could [noun] | 29 |
|
