| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it be [adv] often [verb] | 8 |
|
| 2 | [subord] it [be] [adv] often [verb] | 8 |
|
| 3 | [subord] it [is] [adv] often [verb] | 7 |
|
| 4 | [subord] it is [adv] often [verb] | 5 |
|
