| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it should have been | 24 |
|
| 2 | why [pron] should have been | 17 |
|
| 3 | [Wh adv] it should have been | 17 |
|
| 4 | why [pers pn] should have been | 16 |
|
| 5 | why it [vb mod] have been | 7 |
|
| 6 | why it [modal v] have been | 7 |
|
| 7 | why it should have been | 6 |
|
| 8 | why it should have been | 6 |
|
| 9 | why it should [verb] been | 6 |
|
| 10 | why it should have been | 6 |
|
| 11 | why it should have [been] | 6 |
|
| 12 | why it should have be | 6 |
|
| 13 | why it should have been | 6 |
|
| 14 | why it should [vb infin] been | 6 |
|
| 15 | why it should have [be] | 6 |
|
