| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [noun] | 675 |
|
| 2 | could [noun prp] | 237 |
|
| 3 | [vb mod] mr | 58 |
|
| 4 | [modal v] mr | 58 |
|
| 5 | could mr | 8 |
|
| 6 | could mr | 8 |
|
