| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] [vb pp] [prep] | 618 |
|
| 2 | [modal v] [verb] [vb pp] at | 397 |
|
| 3 | [vb mod] [verb] [vb pp] at | 397 |
|
| 4 | should [verb] [verb] at | 71 |
|
| 5 | should [verb] [vb pp] at | 49 |
|
