| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to [be] | 149 |
|
| 2 | not be [vb pp] to [be] | 114 |
|
| 3 | could not be [vb pp] to | 77 |
|
| 4 | could not be [vb pp] [be] | 6 |
|
