| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [verb] | 15987 |
|
| 2 | could be [vb pp] | 15275 |
|
| 3 | [modal v] be assumed | 226 |
|
| 4 | could be assume | 16 |
|
| 5 | could [be] assumed | 16 |
|
| 6 | could be assumed | 16 |
|
| 7 | could [be] assumed | 16 |
|
