| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [be] [v-ing] | 3655 |
|
| 2 | [noun pl] [pron] [be] [v-ing] | 3361 |
|
| 3 | [noun pl] when [pron] [be] | 880 |
|
