| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have happen to | 513 |
|
| 2 | [prep] [Wh det] have happen | 506 |
|
| 3 | [prep] [Wh det] happen to | 149 |
|
| 4 | [prep] [Wh det] have to | 43 |
|
