| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] happen is this | 7 |
|
| 2 | what happen is this | 7 |
|
| 3 | what happen is this | 7 |
|
| 4 | [Wh det] happen is this | 7 |
|
| 5 | [vb -s] happen is this | 6 |
|
| 6 | have happen is this | 6 |
|
| 7 | [verb] happen is this | 6 |
|
| 8 | 's happen is this | 5 |
|
