| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [prep] [pron] | 34 |
|
| 2 | must have been [prep] [pron] | 34 |
|
| 3 | must have been [prep] [pos pn] | 21 |
|
| 4 | must have been in [pron] | 11 |
|
| 5 | must have been in [pron] | 11 |
|
| 6 | must have been [prep] [pers pn] | 9 |
|
| 7 | must have been [prep] his | 7 |
|
| 8 | must have been for [pron] | 7 |
|
| 9 | must have been [prep] his | 7 |
|
| 10 | must have been for [pron] | 7 |
|
| 11 | must have been [prep] her | 6 |
|
| 12 | must have been [prep] her | 6 |
|
