| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [be] [verb] [art] | 4995 |
|
| 2 | [vb mod] [be] [verb] [art] | 4995 |
|
| 3 | should [be] [verb] [art] | 510 |
|
| 4 | should [be] [verb] [art] | 509 |
|
