| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [adj] | 2345 |
|
| 2 | could be [vb pp] [adj] | 353 |
|
| 3 | could be [verb] [adj] | 262 |
|
| 4 | could [be] [vb pp] [adj] | 239 |
|
| 5 | could be [vb pp] [adj] | 239 |
|
| 6 | could [be] [vb pp] [adj] | 239 |
|
