| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [art] [noun] | 8276 |
|
| 2 | could [vb infin] [art] [noun] | 8228 |
|
| 3 | [modal v] have [art] [noun] | 6780 |
|
| 4 | could have [art] [noun] | 407 |
|
