| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] [prep] [be] [art] | 21 |
|
| 2 | should [vb infin] [prep] [be] [art] | 21 |
|
| 3 | should prove [prep] [be] [art] | 5 |
|
| 4 | should prove [prep] [be] [art] | 5 |
|
