| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [pron] [vb past] [prep] [noun] | 1653 |
|
| 2 | [conj] it [vb past] [prep] [noun] | 717 |
|
| 3 | when it [verb] [prep] [noun] | 573 |
|
| 4 | when it [vb past] [prep] [noun] | 166 |
|
