| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] [prep] [be] a | 17 |
|
| 2 | could [be] [vb pp] [prep] [be] a | 17 |
|
| 3 | could [be] [vb pp] to [be] a | 16 |
|
| 4 | could [be] [vb pp] to [be] a | 16 |
|
