| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have be [verb] [prep] the | 93 |
|
| 2 | [modal v] have be [v-ing] [prep] the | 71 |
|
| 3 | must have be [v-ing] [prep] [art] | 27 |
|
| 4 | must [vb infin] be [v-ing] [prep] the | 22 |
|
| 5 | must have be [v-ing] [prep] the | 22 |
|
| 6 | must have [be] [v-ing] [prep] the | 22 |
|
| 7 | must [verb] be [v-ing] [prep] the | 22 |
|
