| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] be [verb] | 4880 |
|
| 2 | could [adv] be [vb pp] | 4744 |
|
| 3 | [modal v] [adv] be assumed | 143 |
|
| 4 | could [adv] be assume | 9 |
|
| 5 | could [adv] [be] assumed | 9 |
|
