| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [pron] | 15820 |
|
| 2 | it [vb past] [pron] | 6303 |
|
| 3 | [pron] happened [pron] | 84 |
|
| 4 | it happen [pron] | 68 |
|
| 5 | [pers pn] happened [pron] | 41 |
|
| 6 | it happened [pron] | 41 |
|
