| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should have been [vb pp] for [noun sg] | 10 |
|
| 2 | should have [be] [vb pp] for [noun sg] | 10 |
|
| 3 | should have be [vb pp] for [noun sg] | 10 |
|
| 4 | should have [been] [vb pp] for [noun sg] | 10 |
|
