| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [verb] a [noun] [verb] | 15 |
|
| 2 | could [verb] [vb pp] a [noun] [verb] | 12 |
|
| 3 | [modal v] [verb] heard a [noun] [verb] | 10 |
|
| 4 | could [verb] heard a [noun] [verb] | 9 |
|
| 5 | could [verb] heard [art] [noun] [verb] | 9 |
|
| 6 | could [verb] hear a [noun] [verb] | 9 |
|
| 7 | could [verb] heard [art] [noun] [verb] | 9 |
|
