| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] as [adj] | 46 |
|
| 2 | must be [vb pp] as [adj] | 46 |
|
| 3 | must be regard as [adj] | 11 |
|
| 4 | must be regarded as [adj] | 11 |
|
| 5 | must be see as [adj] | 5 |
|
| 6 | must be seen as [adj] | 5 |
|
