| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [verb] | 4623 |
|
| 2 | when it is [verb] | 607 |
|
| 3 | when it is [adv] | 153 |
|
| 4 | when it [adv] [verb] | 114 |
|
