| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] when a | 749 |
|
| 2 | [vb -s] when a | 114 |
|
| 3 | happens when [art] | 100 |
|
| 4 | happens when [art] | 100 |
|
| 5 | happens [conj] a | 57 |
|
| 6 | happen when a | 45 |
|
| 7 | happens when a | 30 |
|
