| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] have happened | 2034 |
|
| 2 | what have happen | 1985 |
|
| 3 | [Wh det] had happen | 1005 |
|
| 4 | [Wh det] 's happen | 538 |
|
| 5 | [Wh det] has happen | 492 |
|
| 6 | whatever have happen | 31 |
|
| 7 | which have happen | 25 |
|
| 8 | [Wh det] have to happen | 8 |
|
| 9 | [Wh det] have happen | 6 |
|
