| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [prep] the | 1458 |
|
| 2 | [modal v] be [v-ing] [prep] the | 975 |
|
| 3 | must be [v-ing] [prep] [art] | 51 |
|
| 4 | must be [v-ing] [prep] [art] | 51 |
|
| 5 | must [be] [v-ing] [prep] the | 32 |
|
| 6 | must [be] [v-ing] [prep] the | 32 |
|
| 7 | must be [v-ing] [prep] the | 32 |
|
| 8 | must be [v-ing] [prep] the | 32 |
|
