| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [adv] happened to | 23 |
|
| 2 | [vb -s] ever happened to | 14 |
|
| 3 | 's [adv] happened to | 14 |
|
| 4 | [vb -s] never happened to | 9 |
|
