| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it [verb] | 5193 |
|
| 2 | when it [vb past] | 2232 |
|
| 3 | when [pron] began | 175 |
|
| 4 | [conj] it began | 163 |
|
| 5 | when it begin | 32 |
|
