| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have [been] [vb pp] to [noun] | 17 |
|
| 2 | should [vb infin] been [vb pp] to [noun] | 17 |
|
| 3 | should [vb infin] [been] [vb pp] to [noun sg] | 10 |
|
