| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [verb] a | 5608 |
|
| 2 | when [verb] a | 716 |
|
| 3 | when [v-ing] a | 674 |
|
| 4 | when [v-ing] [verb] | 265 |
|
