| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] [be] [v-ing] | 58 |
|
| 2 | must [adv] be [v-ing] | 58 |
|
| 3 | must [adv] [be] [v-ing] | 54 |
|
| 4 | must still [be] [v-ing] | 15 |
|
| 5 | must still [be] [v-ing] | 15 |
|
| 6 | must always [be] [v-ing] | 7 |
|
| 7 | must always [be] [v-ing] | 7 |
|
| 8 | must surely [be] [v-ing] | 5 |
|
| 9 | must surely [be] [v-ing] | 5 |
|
