| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what have [verb] i [vb base] | 5 |
|
| 2 | what have [vb pp] i [vb base] | 5 |
|
| 3 | what have happened i [vb base] | 5 |
|
| 4 | what have happen i [vb base] | 5 |
|
