| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] a [noun] [verb] | 11 |
|
| 2 | could [verb] hear a [noun] [verb] | 9 |
|
| 3 | [modal v] have hear a [noun] [verb] | 9 |
|
| 4 | could [vb infin] hear a [noun] [verb] | 9 |
|
| 5 | could have hear a [noun] [verb] | 9 |
|
| 6 | could have hear [art] [noun] [verb] | 8 |
|
| 7 | could have hear a [noun] [verb] | 8 |
|
| 8 | could have hear [art] [noun] [verb] | 8 |
|
