| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [conj] | 10609 |
|
| 2 | it [vb past] [conj] | 3439 |
|
| 3 | [pron] happened [conj] | 313 |
|
| 4 | it happen [conj] | 172 |
|
