| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [vb pp] some [noun sg] | 11 |
|
| 2 | could have [vb pp] some [noun sg] | 11 |
|
| 3 | could [vb infin] [vb pp] some [noun sg] | 11 |
|
| 4 | could have [vb pp] some [noun sg] | 11 |
|
