| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been [adj] [prep] | 170 |
|
| 2 | must [verb] been [adj] [prep] | 170 |
|
| 3 | [modal v] [verb] been [adj] by | 67 |
|
| 4 | must [verb] be [adj] by | 14 |
|
| 5 | must [verb] been [adj] by | 14 |
|
| 6 | must [verb] [been] [adj] by | 14 |
|
| 7 | must [verb] been [adj] by | 14 |
|
| 8 | must [verb] [be] [adj] by | 14 |
|
