| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] [adv] to | 312 |
|
| 2 | [Wh det] [vb -s] happen to | 306 |
|
| 3 | [vb -s] [adv] happen to | 60 |
|
| 4 | [Wh det] [adv] happen to | 49 |
|
| 5 | [Wh det] [vb -s] [adv] happen | 40 |
|
