| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [adv] happen [adj] [noun] | 7 |
|
| 2 | it [vb past] happen [prep] [adj] [noun] | 5 |
|
| 3 | it [vb past] happen [prep] [adj] [noun] | 5 |
|
