| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [adv] [verb] | 407 |
|
| 2 | [verb] it [adv] happen | 38 |
|
| 3 | [vb past] [pron] [adv] happen | 18 |
|
| 4 | [vb past] [pers pn] [adv] happen | 11 |
|
| 5 | [vb past] it [adv] happen | 8 |
|
