| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [vb infin] [prep] [art] | 1972 |
|
| 2 | [vb infin] us [prep] [art] | 375 |
|
| 3 | should [vb infin] us [prep] | 46 |
|
| 4 | should [vb infin] us [art] | 12 |
|
