| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] not occur | 15 |
|
| 2 | it [vb mod] [not/n't] occur | 15 |
|
| 3 | it would [adv] occur | 11 |
|
| 4 | it [vb mod] not occur | 10 |
|
| 5 | it [vb mod] [adv] occur | 9 |
|
| 6 | it [vb mod] n't occur | 5 |
|
| 7 | it can [adv] occur | 5 |
|
