| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [adv] [be] used | 267 |
|
| 2 | should only [be] [verb] | 214 |
|
| 3 | should only [be] [vb pp] | 211 |
|
| 4 | [modal v] only [be] used | 186 |
|
| 5 | should only [be] use | 49 |
|
| 6 | should only [be] used | 49 |
|
