| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] should [vb infin] been [prep] | 74 |
|
| 2 | when [pers pn] should [vb infin] been | 29 |
|
| 3 | when [pers pn] should [vb infin] [prep] | 7 |
|
