| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] | 151904 |
|
| 2 | could be [verb] | 15987 |
|
| 3 | could [be] [vb pp] | 15277 |
|
| 4 | could be [vb pp] | 15277 |
|
| 5 | could [be] [vb pp] | 15275 |
|
