| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun pl] when [pron] [vb past] | 112 |
|
| 2 | [prep] [noun pl] [conj] it [vb past] | 110 |
|
| 3 | [prep] [noun] when it [vb past] | 103 |
|
| 4 | [prep] [noun pl] when it [verb] | 36 |
|
