| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pers pn] could [vb infin] | 12625 |
|
| 2 | before [pers pn] [modal v] [vb infin] | 1801 |
|
| 3 | before [pron] could [vb infin] | 1078 |
|
| 4 | before [pers pn] could [verb] | 1042 |
|
