| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could be [vb pp] to [art] | 280 |
|
| 2 | be [vb pp] to [be] [art] | 205 |
|
| 3 | could be [vb pp] to [be] | 149 |
|
| 4 | could be [vb pp] [be] [art] | 13 |
|
