| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [verb] been at the | 7 |
|
| 2 | should [vb infin] [been] at the | 7 |
|
| 3 | should [verb] [been] at the | 7 |
|
| 4 | should have [been] at the | 7 |
|
| 5 | should have [been] at the | 7 |
|
