| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [adv] happen [prep] | 17 |
|
| 2 | [Wh pn] [adv] happen to | 17 |
|
| 3 | [Wh pn] just happen [prep] | 10 |
|
| 4 | [Wh pn] [adv] happened [prep] | 9 |
|
| 5 | [Wh pn] also happen [prep] | 7 |
|
| 6 | [Wh pn] [adv] happens [prep] | 6 |
|
