| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must be to be | 6 |
|
| 2 | it must be to be | 5 |
|
| 3 | [pers pn] must be to be | 5 |
|
| 4 | it must be to be | 5 |
|
| 5 | must be [verb] to be | 71 |
|
| 6 | must be [vb pp] to be | 70 |
|
| 7 | must be [adj] to be | 36 |
|
| 8 | must be [adj] to be | 35 |
|
| 9 | must be see to be | 32 |
|
| 10 | must be seen to be | 32 |
|
| 11 | must be assume to be | 8 |
|
| 12 | must be assumed to be | 8 |
|
