| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] to [be] | 149 |
|
| 2 | [conj] could [be] [vb pp] to | 66 |
|
| 3 | [conj] [be] [vb pp] to [be] | 13 |
|
| 4 | [conj] could [be] [vb pp] [be] | 9 |
|
