| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [pers pn] [vb infin] [conj] | 1606 |
|
| 2 | could [pron] [vb infin] [conj] | 168 |
|
| 3 | could [pers pn] [verb] [conj] | 156 |
|
