| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and should only [be] [vb pp] | 20 |
|
| 2 | and should only be [verb] | 20 |
|
| 3 | and should only [be] [verb] | 20 |
|
| 4 | and should only [be] used | 6 |
|
| 5 | and should only [be] use | 6 |
|
