| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] to [noun] | 88 |
|
| 2 | must be [verb] to [noun sg] | 38 |
|
| 3 | must be [verb] to [noun prp] | 25 |
|
| 4 | must be [verb] to [noun pl] | 25 |
|
| 5 | must be [verb] to lifespan | 10 |
|
| 6 | must be [verb] to lifespan | 10 |
|
| 7 | must be known to [noun] | 8 |
|
| 8 | must be know to [noun] | 8 |
|
| 9 | must be refer to [noun] | 6 |
|
| 10 | must be send to [noun] | 6 |
|
| 11 | must be give to [noun] | 6 |
|
| 12 | must be given to [noun] | 6 |
|
| 13 | must be sent to [noun] | 6 |
|
| 14 | must be relate to [noun] | 5 |
|
| 15 | must be make to [noun] | 5 |
|
| 16 | must be [v-ing] to [noun] | 5 |
|
| 17 | must be made to [noun] | 5 |
|
| 18 | must be related to [noun] | 5 |
|
| 19 | must be referred to [noun] | 5 |
|
