| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be seen to be [verb] | 50 |
|
| 2 | must be [verb] to be [verb] | 15 |
|
| 3 | must be [vb pp] to be [verb] | 14 |
|
| 4 | must be seen to [be] [verb] | 11 |
|
| 5 | must be seen to be [verb] | 11 |
|
| 6 | must [be] seen to be [verb] | 11 |
|
| 7 | must be seen to [be] [verb] | 11 |
|
| 8 | must be see to be [verb] | 11 |
|
| 9 | must be seen to be [verb] | 11 |
|
| 10 | must be seen to be [verb] | 11 |
|
| 11 | must be seen [prep] be [verb] | 11 |
|
| 12 | must be seen [prep] be [verb] | 11 |
|
| 13 | must [be] seen to be [verb] | 11 |
|
