| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [be] [vb pp] [adj] | 239 |
|
| 2 | [be] [vb pp] of [adj] | 172 |
|
| 3 | could [be] [vb pp] of | 161 |
|
| 4 | could [be] of [adj] | 41 |
|
