| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [adv] have [verb] | 522 |
|
| 2 | [pron] [vb mod] [adv] have happen | 54 |
|
| 3 | it [vb mod] [adv] [verb] happen | 45 |
|
| 4 | it [vb mod] [adv] have happen | 44 |
|
| 5 | [pers pn] [vb mod] [adv] have happen | 44 |
|
| 6 | it [modal v] [adv] have happen | 44 |
|
