| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have been [noun] | 38 |
|
| 2 | should have [been] [noun sg] | 14 |
|
| 3 | should have [been] [noun prp] | 13 |
|
| 4 | should have [been] [noun pl] | 8 |
|
