| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] that [pers pn] must have been | 18 |
|
| 2 | [vb past] that [pers pn] must have [been] | 18 |
|
| 3 | [vb past] that she must have [been] | 8 |
|
| 4 | [vb past] that it must have [been] | 6 |
|
