| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [vb pp] | 4744 |
|
| 2 | [vb mod] still [be] [vb pp] | 718 |
|
| 3 | [modal v] still [be] [vb pp] | 718 |
|
| 4 | could still [be] [verb] | 118 |
|
| 5 | could still [be] [vb pp] | 105 |
|
