| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must [verb] seen the | 8 |
|
| 2 | [noun] must have seen the | 8 |
|
| 3 | [noun] must [vb infin] seen the | 8 |
|
| 4 | [noun] must have seen the | 8 |
|
