| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they should have [vb pp] [adj] | 21 |
|
| 2 | they should have [vb pp] [det] | 14 |
|
| 3 | they should have had [adj] | 5 |
|
| 4 | they should have [vb pp] that | 5 |
|
| 5 | they should have [vb pp] that | 5 |
|
