| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] [verb] [prep] | 21071 |
|
| 2 | is [adv] [verb] [prep] | 17526 |
|
| 3 | be often [verb] [prep] | 2267 |
|
| 4 | [be] often [verb] [prep] | 2267 |
|
| 5 | [is] often [verb] [prep] | 1003 |
|
| 6 | is often [verb] [prep] | 984 |
|
