| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be [v-ing] to | 3260 |
|
| 2 | [noun] must be [v-ing] | 248 |
|
| 3 | must be [v-ing] to | 30 |
|
| 4 | [noun] must be to | 23 |
|
