| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] must [be] [v-ing] for | 10 |
|
| 2 | [pron] must [be] [v-ing] for | 10 |
|
| 3 | [noun] must [be] [v-ing] for | 5 |
|
| 4 | must [verb] [be] [v-ing] for | 18 |
|
| 5 | must have [be] [v-ing] for | 18 |
|
| 6 | must [vb infin] [be] [v-ing] for | 18 |
|
| 7 | must have [be] [v-ing] for | 18 |
|
| 8 | must [be] [v-ing] [adv] for | 12 |
|
| 9 | must [be] [v-ing] [adv prt] for | 11 |
|
| 10 | must [be] [v-ing] on for | 9 |
|
| 11 | must [be] [v-ing] on for | 9 |
|
| 12 | must [be] [v-ing] for [art] | 8 |
|
| 13 | must [be] [v-ing] for [art] | 8 |
|
| 14 | must [be] [v-ing] for [pron] | 6 |
|
