| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [prep] [adj] | 4008 |
|
| 2 | it [vb past] [prep] [adj] | 1477 |
|
| 3 | [pron] happened [prep] [adj] | 215 |
|
| 4 | it happen [prep] [adj] | 69 |
|
| 5 | it happened [prep] [adj] | 23 |
|
