| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to [adj] | 78 |
|
| 2 | [conj] could be [vb pp] to | 66 |
|
| 3 | [conj] could be [vb pp] [adj] | 19 |
|
| 4 | [conj] be [vb pp] to [adj] | 8 |
|
