| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [adv] [verb] [conj] | 317 |
|
| 2 | [conj] it be often [verb] [conj] | 21 |
|
| 3 | [conj] it [be] often [verb] [conj] | 21 |
|
| 4 | [conj] it [is] often [verb] [conj] | 18 |
|
| 5 | [conj] [pron] is often [verb] [conj] | 18 |
|
| 6 | [conj] [pers pn] is often [verb] [conj] | 17 |
|
| 7 | [conj] it is often [verb] [conj] | 16 |
|
