| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [verb] | 45395 |
|
| 2 | [pron] could [vb infin] | 45138 |
|
| 3 | [pron] [modal v] hear | 2180 |
|
| 4 | [pron] could hear | 1077 |
|
