| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] [verb] when | 493 |
|
| 2 | [verb] [pron] happen [conj] | 180 |
|
| 3 | [verb] [pron] happen [subord] | 136 |
|
| 4 | [verb] [pron] happen when | 79 |
|
