| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | should [adv] [verb] been [prep] [det] | 5 |
|
| 2 | should [adv] have been [prep] [det] | 5 |
|
| 3 | should [adv] [vb infin] been [prep] [det] | 5 |
|
| 4 | should [adv] have been [prep] [det] | 5 |
|
