| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [verb] been [art] [adj] | 93 |
|
| 2 | it must [verb] been [art] [adj] | 93 |
|
| 3 | it must [verb] been a [adj] | 77 |
|
| 4 | it [vb mod] [verb] been an [adj] | 29 |
|
| 5 | it [modal v] [verb] been an [adj] | 29 |
|
| 6 | [pron] must [verb] been an [adj] | 17 |
|
| 7 | it must [verb] been an [adj] | 6 |
|
| 8 | it must [verb] [been] an [adj] | 6 |
|
| 9 | it must [verb] be an [adj] | 6 |
|
| 10 | it must [verb] [be] an [adj] | 6 |
|
