| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [adv] happened to | 33 |
|
| 2 | has [adv] happen to | 23 |
|
| 3 | has not happen to | 10 |
|
| 4 | has [not/n't] happen to | 10 |
|
| 5 | has n't happen to | 9 |
|
| 6 | has ever happen to | 7 |
|
| 7 | has ever happen to | 7 |
|
| 8 | has never happen to | 5 |
|
| 9 | has never happen to | 5 |
|
