| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [be] [v-ing] | 144 |
|
| 2 | when it be [v-ing] | 144 |
|
| 3 | when it [is] [v-ing] | 95 |
|
| 4 | when it is [v-ing] | 53 |
|
| 5 | when it [was/were] [v-ing] | 49 |
|
| 6 | when it was [v-ing] | 48 |
|
| 7 | when it 's [v-ing] | 42 |
|
| 8 | when it [be] raining | 16 |
|
| 9 | when it [be] going | 14 |
|
| 10 | when it [be] gon | 5 |
|
| 11 | when it [be] operating | 5 |
|
| 12 | when it [be] getting | 5 |
|
