| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [verb] [verb] [prep] this | 28 |
|
| 2 | when [pron] [verb] [v-ing] [prep] [adj] | 20 |
|
| 3 | [conj] [pron] [verb] [v-ing] [prep] this | 18 |
|
