| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] have [verb] [verb] | 44 |
|
| 2 | [pron] [vb mod] have happen [verb] | 10 |
|
| 3 | [Wh det] [modal v] have happen [verb] | 7 |
|
| 4 | [Wh det] [vb mod] [verb] happen [verb] | 7 |
|
