| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could have | 5696 |
|
| 2 | one could [verb] | 978 |
|
| 3 | one could [vb infin] | 975 |
|
| 4 | one [modal v] have | 521 |
|
| 5 | one could have | 82 |
|
