| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [verb] [v-ing] [prep] | 128 |
|
| 2 | when [pron] [verb] [prep] this | 102 |
|
| 3 | [pron] [verb] [v-ing] [prep] this | 56 |
|
