| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [pron] | 12219 |
|
| 2 | could [vb infin] [pron] | 12148 |
|
| 3 | [vb mod] hear [pron] | 913 |
|
| 4 | [modal v] hear [pron] | 913 |
|
| 5 | could hear [pron] | 395 |
|
| 6 | could hear [pron] | 394 |
|
