| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] [verb] [art] | 1072 |
|
| 2 | [modal v] [verb] [vb infin] [art] | 341 |
|
| 3 | [vb mod] [verb] [vb infin] [art] | 341 |
|
| 4 | should [verb] [vb infin] [art] | 16 |
|
