| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] [be] [v-ing] [prep] | 2680 |
|
| 2 | when [pron] [be] [v-ing] [prep] | 213 |
|
| 3 | [verb] when [pron] [be] [v-ing] | 175 |
|
| 4 | [verb] when [pron] [be] [prep] | 53 |
|
