| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [noun] | 675 |
|
| 2 | could [noun sg] | 326 |
|
| 3 | [modal v] practice | 16 |
|
| 4 | [vb mod] practice | 16 |
|
| 5 | could practice | 5 |
|
| 6 | could practice | 5 |
|
