| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] when [v-ing] [prep] | 126 |
|
| 2 | when [v-ing] [prep] an | 29 |
|
| 3 | [adj] [v-ing] [prep] an | 6 |
|
| 4 | [adj] when [v-ing] an | 6 |
|
