| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] [art] | 6890 |
|
| 2 | [vb mod] do [art] | 1773 |
|
| 3 | [modal v] do [art] | 1773 |
|
| 4 | should do [art] | 76 |
|
