| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] [prep] be [adj] | 34 |
|
| 2 | could [be] [vb pp] to be [adj] | 34 |
|
| 3 | could [be] [vb pp] [prep] be [adj] | 30 |
|
| 4 | could [be] said [prep] be [adj] | 21 |
|
