| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [pron] [art] | 433 |
|
| 2 | [modal v] [verb] i [art] | 414 |
|
| 3 | [vb mod] [verb] i [art] | 414 |
|
| 4 | could [verb] i [art] | 50 |
|
