| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] [pers pn] all | 10 |
|
| 2 | could have [vb pp] [pers pn] all | 10 |
|
| 3 | could [vb infin] [vb pp] it all | 7 |
|
