| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] must have been [adv] | 254 |
|
| 2 | [pers pn] have been [adv] [det] | 97 |
|
| 3 | [pers pn] must have been [det] | 31 |
|
| 4 | must have been [adv] [det] | 12 |
|
