| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have [verb] [pron] to | 247 |
|
| 2 | could have [verb] [pron] [prep] | 214 |
|
| 3 | could have [verb] [pron] [prep] | 214 |
|
| 4 | could [verb] [verb] [pron] to | 36 |
|
| 5 | could have [verb] [pron] to | 33 |
|
