| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] previously have [been] [vb pp] | 7 |
|
| 2 | [vb mod] previously have [been] [vb pp] | 7 |
|
| 3 | previously [modal v] have [been] [vb pp] | 5 |
|
| 4 | previously [vb mod] have [been] [vb pp] | 5 |
|
