| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it must [verb] been | 49 |
|
| 2 | [adv] it must [verb] been | 48 |
|
| 3 | so it [modal v] [verb] been | 33 |
|
| 4 | so [pron] must [verb] been | 24 |
|
| 5 | so it must [verb] [been] | 13 |
|
| 6 | so it must [verb] [be] | 13 |
|
| 7 | so it must [verb] be | 13 |
|
| 8 | so it must [verb] been | 13 |
|
