| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] to | 2593 |
|
| 2 | [Wh det] happen to | 1292 |
|
| 3 | [Wh det] [vb -s] happen | 1079 |
|
| 4 | [vb -s] happen to | 453 |
|
