| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [prep] | 294 |
|
| 2 | must have been [prep] | 294 |
|
| 3 | [modal v] have been with | 38 |
|
| 4 | [vb mod] have been with | 38 |
|
| 5 | must have be with | 7 |
|
| 6 | must have [been] with | 7 |
|
| 7 | must have been with | 7 |
|
| 8 | must have [be] with | 7 |
|
| 9 | must have been with | 7 |
|
| 10 | must [verb] been with | 7 |
|
