| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [be] be | 25 |
|
| 2 | [be] could be | 24 |
|
| 3 | [vb mod] [be] could | 13 |
|
| 4 | [vb mod] could be | 9 |
|
