| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [verb] | 4878 |
|
| 2 | [vb mod] only [be] [verb] | 2546 |
|
| 3 | [modal v] only [be] [verb] | 2546 |
|
| 4 | could only [be] [verb] | 512 |
|
| 5 | could only [be] [verb] | 512 |
|
