| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] [pron] | 367 |
|
| 2 | [adv] have [verb] [pron] to | 108 |
|
| 3 | could [adv] [verb] [pron] to | 102 |
|
| 4 | could [adv] have [verb] to | 44 |
|
| 5 | could have [verb] [pron] to | 33 |
|
