| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to | 869 |
|
| 2 | be [vb pp] [adj] to | 508 |
|
| 3 | could be [vb pp] [adj] | 239 |
|
| 4 | could be [adj] to | 161 |
|
