| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [not/n't] be | 4549 |
|
| 2 | it [modal v] [not/n't] be | 4549 |
|
| 3 | [pron] should [not/n't] be | 1364 |
|
| 4 | it should [adv] be | 846 |
|
| 5 | it should [not/n't] [be] | 461 |
|
| 6 | it should [not/n't] be | 461 |
|
