| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [noun] | 127 |
|
| 2 | could [adv] [noun] | 49 |
|
| 3 | [modal v] only [noun] | 27 |
|
| 4 | [vb mod] only [noun] | 27 |
|
| 5 | could only [noun] | 9 |
|
| 6 | could only [noun] | 9 |
|
