| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [noun] could | 7697 |
|
| 2 | the problem [modal v] | 311 |
|
| 3 | the problem [vb mod] | 311 |
|
| 4 | [art] problem could | 35 |
|
| 5 | the problem could | 34 |
|
