| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [not/n't] [be] [verb] | 74 |
|
| 2 | it must [not/n't] [be] [vb pp] | 74 |
|
| 3 | it [modal v] [not/n't] [be] assumed | 73 |
|
| 4 | it must [adv] [be] assumed | 8 |
|
| 5 | [pron] must [not/n't] [be] assumed | 8 |
|
| 6 | it must [not/n't] [be] assume | 8 |
|
