| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not be [vb pp] to | 90 |
|
| 2 | could be [vb pp] to [adj] | 78 |
|
| 3 | not be [vb pp] to [adj] | 71 |
|
| 4 | could not be [vb pp] [adj] | 39 |
|
