| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] it | 19866 |
|
| 2 | [vb mod] [vb infin] happen | 479 |
|
| 3 | [vb infin] it happen | 111 |
|
| 4 | [vb mod] it happen | 19 |
|
