| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] been [vb pp] [prep] | 238 |
|
| 2 | must [verb] been [vb pp] [prep] | 238 |
|
| 3 | [vb mod] [verb] been [vb pp] for | 235 |
|
| 4 | [modal v] [verb] been [vb pp] for | 235 |
|
| 5 | must [verb] been [verb] for | 36 |
|
| 6 | must [verb] [be] [vb pp] for | 18 |
|
| 7 | must [verb] [been] [vb pp] for | 18 |
|
| 8 | must [verb] been [vb pp] for | 18 |
|
| 9 | must [verb] be [vb pp] for | 18 |
|
| 10 | must [verb] been [vb pp] for | 18 |
|
