| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it had happen [adj] [noun] | 9 |
|
| 2 | it [vb past] happen [adj] [noun pl] | 6 |
|
| 3 | it [vb past] happen [det] [noun] | 6 |
|
| 4 | it [vb past] happened [adj] [noun] | 6 |
|
| 5 | it [vb past] happen [adj] time | 5 |
|
