| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [det] [noun] | 1988 |
|
| 2 | [pron] happen [det] [noun] | 66 |
|
| 3 | it happen [adj] [noun] | 36 |
|
| 4 | [pers pn] happen [det] [noun] | 17 |
|
| 5 | it happen [det] [noun] | 17 |
|
