| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [verb] [conj] | 1553 |
|
| 2 | [pron] [vb mod] [verb] when | 542 |
|
| 3 | it [vb mod] [verb] [subord] | 308 |
|
| 4 | it [vb mod] [verb] when | 35 |
|
| 5 | it [modal v] [verb] when | 35 |
|
