| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [art] [noun] | 4542 |
|
| 2 | [vb infin] [art] [noun] [Wh pn] | 370 |
|
| 3 | should [vb infin] [noun] [Wh pn] | 7 |
|
| 4 | should [art] [noun] [Wh pn] | 5 |
|
