| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adv] [verb] | 1804 |
|
| 2 | [conj] it be often [verb] | 93 |
|
| 3 | [conj] it [be] often [verb] | 93 |
|
| 4 | [conj] [pron] is often [verb] | 86 |
|
| 5 | [conj] it [is] often [verb] | 82 |
|
