| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it is [verb] | 3901 |
|
| 2 | it is often [verb] | 364 |
|
| 3 | [subord] it is often | 74 |
|
| 4 | [subord] is often [verb] | 50 |
|
| 5 | [subord] it often [verb] | 30 |
|
