| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [vb pp] some | 83 |
|
| 2 | must have [vb pp] some | 83 |
|
| 3 | must have had some | 32 |
|
| 4 | must have taken some | 8 |
|
| 5 | must have done some | 5 |
|
