| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | occurs when a [noun sg] | 27 |
|
| 2 | happens when a [noun sg] | 17 |
|
| 3 | [vb -s] when a person | 10 |
|
| 4 | arises when a [noun sg] | 8 |
|
