| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be seen to be [verb] | 11 |
|
| 2 | must be seen [prep] be [verb] | 11 |
|
| 3 | must be seen to be [verb] | 11 |
|
| 4 | must be seen [prep] be [vb pp] | 7 |
|
