| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [pron] must [verb] been | 77 |
|
| 2 | [conj] he must [verb] been | 41 |
|
| 3 | but he [modal v] [verb] been | 26 |
|
| 4 | but he must [verb] be | 12 |
|
| 5 | but he must [verb] [been] | 12 |
|
| 6 | but he must [verb] [be] | 12 |
|
