| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [vb pp] [prep] some | 469 |
|
| 2 | must [verb] [been] [vb pp] [prep] | 238 |
|
| 3 | must [verb] [vb pp] [prep] some | 22 |
|
| 4 | must [verb] [been] [prep] some | 6 |
|
