| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] to [be] a | 1207 |
|
| 2 | could [be] [vb pp] to [be] | 149 |
|
| 3 | could [be] [vb pp] to a | 82 |
|
| 4 | could [be] [vb pp] [be] a | 6 |
|
