| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [is] [verb] | 7897 |
|
| 2 | [is] often [verb] | 1943 |
|
| 3 | [conj] often [verb] | 880 |
|
| 4 | [conj] [is] often | 260 |
|
