| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [v-ing] when [pron] [verb] | 180 |
|
| 2 | [is] [v-ing] [conj] [pron] [verb] | 154 |
|
| 3 | [is] [verb] when [pron] [verb] | 68 |
|
