| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [be] [prep] [noun] | 35 |
|
| 2 | [modal v] [vb infin] [be] on [noun] | 25 |
|
| 3 | should [verb] [be] on [noun] | 6 |
|
