| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [verb] a [noun] | 3272 |
|
| 2 | [vb mod] [vb infin] [verb] a [noun] | 3272 |
|
| 3 | could [vb infin] [verb] [art] [noun] | 836 |
|
| 4 | could [verb] [verb] a [noun] | 250 |
|
| 5 | could [vb infin] [verb] a [noun] | 249 |
|
