| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] see the | 25 |
|
| 2 | must [verb] see the | 25 |
|
| 3 | must [verb] seen the | 23 |
|
| 4 | must have see the | 22 |
|
| 5 | must have see the | 20 |
|
