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