| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [been] at | 139 |
|
| 2 | should [vb infin] [been] [prep] | 116 |
|
| 3 | should [vb infin] [been] [prep] | 116 |
|
| 4 | should [verb] [been] at | 21 |
|
| 5 | should [vb infin] [be] at | 21 |
|
| 6 | should [vb infin] [been] at | 21 |
|
