| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it [is] [verb] | 1816 |
|
| 2 | [Wh adv] it [is] [verb] | 688 |
|
| 3 | when it [be] [verb] | 345 |
|
| 4 | when [pron] [is] [verb] | 149 |
|
| 5 | when it [is] [verb] | 61 |
|
