| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [vb pp] [art] | 583 |
|
| 2 | should never [vb infin] [vb pp] | 166 |
|
| 3 | never [vb infin] [vb pp] [art] | 114 |
|
| 4 | should never [vb infin] [art] | 45 |
|
