| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [v-ing] | 111733 |
|
| 2 | [subord] [v-ing] | 31155 |
|
| 3 | when [verb] | 12845 |
|
| 4 | when [v-ing] | 7141 |
|
