| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [adv] to | 5610 |
|
| 2 | [adv] happen to | 484 |
|
| 3 | [vb -s] [adv] happen | 481 |
|
| 4 | [vb -s] happen to | 453 |
|
