| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] be [vb pp] to [adj] | 190 |
|
| 2 | must [adv] be [vb pp] to | 99 |
|
| 3 | must be [vb pp] to [adj] | 32 |
|
| 4 | must [adv] be [vb pp] [adj] | 28 |
|
