| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [conj] [v-ing] [prep] | 1697 |
|
| 2 | [adv] [subord] [v-ing] [prep] | 927 |
|
| 3 | [adv] when [verb] [prep] | 486 |
|
| 4 | [adv] when [v-ing] [prep] | 122 |
|
