| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [adv] happened [adv] | 48 |
|
| 2 | it have never [verb] [adv] | 35 |
|
| 3 | it have never [vb pp] [adv] | 35 |
|
| 4 | it have [adv] happened [adv] | 29 |
|
| 5 | [pron] have never happened [adv] | 12 |
|
| 6 | it have never happened [adv] | 11 |
|
| 7 | it have never happen [adv] | 11 |
|
| 8 | it [verb] never happened [adv] | 11 |
|
