| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [is] [adv] [v-ing] | 301 |
|
| 2 | when it [is] [adv] [verb] | 66 |
|
| 3 | when [pron] [is] [adv] [v-ing] | 26 |
|
| 4 | when it [is] [adv] [v-ing] | 20 |
|
| 5 | when it [be] [adv] [v-ing] | 11 |
|
