| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adv] [verb] | 17890 |
|
| 2 | it [adv] [vb infin] | 444 |
|
| 3 | it [adv] happen | 405 |
|
| 4 | [pron] [adv] happen | 16 |
|
| 5 | [pers pn] [adv] happen | 15 |
|
| 6 | it [adv] happen | 14 |
|
