| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [vb mod] only [be] used | 13 |
|
| 2 | and [vb mod] only be used | 13 |
|
| 3 | and should only [be] used | 6 |
|
| 4 | and can only [be] used | 5 |
|
