| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [v-ing] when it | 5 |
|
| 2 | [prep] [v-ing] [noun] when it | 8 |
|
| 3 | [prep] [v-ing] when it [be] | 5 |
|
| 4 | [prep] [v-ing] when it be | 5 |
|
